chore(deps): update codecov/codecov-action digest to 671740a

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/build_container.yaml

@@ -14,7 +14,7 @@ on:
       - "**.md"
 
 env:
-  GO_VERSION: "~1.23"
+  GO_VERSION: "~1.24"
   IMAGE_NAME: "k8sgpt"
   REGISTRY_IMAGE: ghcr.io/k8sgpt-ai/k8sgpt
 

.github/workflows/release.yaml

@@ -61,7 +61,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff # v5
         with:
-          go-version: '1.22'
+          go-version: '~1.24'
       - name: Download Syft
         uses: anchore/sbom-action/download-syft@55dc4ee22412511ee8c3142cbea40418e6cec693 # v0.17.8
       - name: Run GoReleaser

.github/workflows/test.yaml

@@ -9,7 +9,7 @@ on:
       - main
 
 env:
-  GO_VERSION: "~1.22"
+  GO_VERSION: "~1.24"
 
 jobs:
   build:
@@ -25,6 +25,6 @@ jobs:
       - name: Run test
         run: go test ./... -coverprofile=coverage.txt
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@18283e04ce6e62d37312384ff67231eb8fd56d24 # v5
+        uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

.release-please-manifest.json

@@ -1 +1 @@
-{".":"0.4.27"}
+{".":"0.4.30"}

CHANGELOG.md

@@ -1,5 +1,52 @@
 # Changelog
 
+## [0.4.30](https://github.com/k8sgpt-ai/k8sgpt/compare/v0.4.29...v0.4.30) (2026-02-20)
+
+
+### Bug Fixes
+
+* validate namespace before running custom analyzers ([#1617](https://github.com/k8sgpt-ai/k8sgpt/issues/1617)) ([458aa9d](https://github.com/k8sgpt-ai/k8sgpt/commit/458aa9debac7590eb0855ffd12141b702e999a36))
+
+## [0.4.29](https://github.com/k8sgpt-ai/k8sgpt/compare/v0.4.28...v0.4.29) (2026-02-20)
+
+
+### Features
+
+* **serve:** add short flag and env var for metrics port ([#1616](https://github.com/k8sgpt-ai/k8sgpt/issues/1616)) ([4f63e97](https://github.com/k8sgpt-ai/k8sgpt/commit/4f63e9737c6a2306686bd3b6f37e81f210665949))
+
+
+### Bug Fixes
+
+* **deps:** update k8s.io/utils digest to b8788ab ([#1572](https://github.com/k8sgpt-ai/k8sgpt/issues/1572)) ([a56e478](https://github.com/k8sgpt-ai/k8sgpt/commit/a56e4788c3361a64df17175f163f33422a8fe606))
+* use proper JSON marshaling for customrest prompt to handle special characters ([#1615](https://github.com/k8sgpt-ai/k8sgpt/issues/1615)) ([99911fb](https://github.com/k8sgpt-ai/k8sgpt/commit/99911fbb3ac8c950fd7ee1b3210f8a9c2a6b0ad7)), closes [#1556](https://github.com/k8sgpt-ai/k8sgpt/issues/1556)
+
+
+### Refactoring
+
+* improve MCP server handlers with better error handling and pagination ([#1613](https://github.com/k8sgpt-ai/k8sgpt/issues/1613)) ([abc4647](https://github.com/k8sgpt-ai/k8sgpt/commit/abc46474e372bcd27201f1a64372c04269acee13))
+
+## [0.4.28](https://github.com/k8sgpt-ai/k8sgpt/compare/v0.4.27...v0.4.28) (2026-02-15)
+
+
+### Features
+
+* add Groq as LLM provider ([#1600](https://github.com/k8sgpt-ai/k8sgpt/issues/1600)) ([867bce1](https://github.com/k8sgpt-ai/k8sgpt/commit/867bce1907f5dd3387128b72c694e98091d55554))
+* multiple security fixes. Prometheus: v0.302.1 → v0.306.0 ([#1597](https://github.com/k8sgpt-ai/k8sgpt/issues/1597)) ([f5fb2a7](https://github.com/k8sgpt-ai/k8sgpt/commit/f5fb2a7e12e14fad8107940aeead5e60b064add1))
+
+
+### Bug Fixes
+
+* align CI Go versions with go.mod to ensure consistency ([#1611](https://github.com/k8sgpt-ai/k8sgpt/issues/1611)) ([1f2ff98](https://github.com/k8sgpt-ai/k8sgpt/commit/1f2ff988342b8ef2aa3e3263eb845c0ee09fe24c))
+* **deps:** update module gopkg.in/yaml.v2 to v3 ([#1550](https://github.com/k8sgpt-ai/k8sgpt/issues/1550)) ([7fe3bdb](https://github.com/k8sgpt-ai/k8sgpt/commit/7fe3bdbd952bc9a1975121de5f21ad31dc1f691d))
+* use MaxCompletionTokens instead of deprecated MaxTokens for OpenAI ([#1604](https://github.com/k8sgpt-ai/k8sgpt/issues/1604)) ([c80b2e2](https://github.com/k8sgpt-ai/k8sgpt/commit/c80b2e2c346845336593ce515fe90fd501b1d0a7))
+
+
+### Other
+
+* **deps:** update actions/checkout digest to 93cb6ef ([#1592](https://github.com/k8sgpt-ai/k8sgpt/issues/1592)) ([40ffcbe](https://github.com/k8sgpt-ai/k8sgpt/commit/40ffcbec6b65e3a99e40be5f414a3f2c087bffbb))
+* **deps:** update actions/setup-go digest to 40f1582 ([#1593](https://github.com/k8sgpt-ai/k8sgpt/issues/1593)) ([a303ffa](https://github.com/k8sgpt-ai/k8sgpt/commit/a303ffa21c7ede3dd9391185bc91fb3b4e8276b6))
+* util tests ([#1594](https://github.com/k8sgpt-ai/k8sgpt/issues/1594)) ([21369c5](https://github.com/k8sgpt-ai/k8sgpt/commit/21369c5c0917fd2b6ae4173378b2e257e2b1de7b))
+
 ## [0.4.27](https://github.com/k8sgpt-ai/k8sgpt/compare/v0.4.26...v0.4.27) (2025-12-18)
 
 

CONTRIBUTING.md

@@ -2,7 +2,7 @@
 We're happy that you want to contribute to this project. Please read the sections to make the process as smooth as possible.
 
 ## Requirements
-- Golang `1.23`
+- Golang `1.24+`
 - An OpenAI API key
   * OpenAI API keys can be obtained from [OpenAI](https://platform.openai.com/account/api-keys)
   * You can set the API key for k8sgpt using `./k8sgpt auth key`

README.md

@@ -21,6 +21,10 @@ It has SRE experience codified into its analyzers and helps to pull out the most
 
 _Out of the box integration with OpenAI, Azure, Cohere, Amazon Bedrock, Google Gemini and local models._
 
+
+> **Sister project:** Check out [sympozium](https://github.com/AlexsJones/sympozium/) for managing agents in Kubernetes.
+
+
 <a href="https://www.producthunt.com/posts/k8sgpt?utm_source=badge-featured&utm_medium=badge&utm_souce=badge-k8sgpt" target="_blank"><img src="https://api.producthunt.com/widgets/embed-image/v1/featured.svg?post_id=389489&theme=light" alt="K8sGPT - K8sGPT&#0032;gives&#0032;Kubernetes&#0032;Superpowers&#0032;to&#0032;everyone | Product Hunt" style="width: 250px; height: 54px;" width="250" height="54" /></a> <a href="https://hellogithub.com/repository/9dfe44c18dfb4d6fa0181baf8b2cf2e1" target="_blank"><img src="https://abroad.hellogithub.com/v1/widgets/recommend.svg?rid=9dfe44c18dfb4d6fa0181baf8b2cf2e1&claim_uid=gqG4wmzkMrP0eFy" alt="Featured｜HelloGitHub" style="width: 250px; height: 54px;" width="250" height="54" /></a>
 
 
@@ -63,7 +67,7 @@ brew install k8sgpt
   <!---x-release-please-start-version-->
 
   ```
-  sudo rpm -ivh https://github.com/k8sgpt-ai/k8sgpt/releases/download/v0.4.27/k8sgpt_386.rpm
+  sudo rpm -ivh https://github.com/k8sgpt-ai/k8sgpt/releases/download/v0.4.30/k8sgpt_386.rpm
   ```
   <!---x-release-please-end-->
 
@@ -71,7 +75,7 @@ brew install k8sgpt
 
   <!---x-release-please-start-version-->
   ```
-  sudo rpm -ivh https://github.com/k8sgpt-ai/k8sgpt/releases/download/v0.4.27/k8sgpt_amd64.rpm
+  sudo rpm -ivh https://github.com/k8sgpt-ai/k8sgpt/releases/download/v0.4.30/k8sgpt_amd64.rpm
   ```
   <!---x-release-please-end-->
 </details>
@@ -84,7 +88,7 @@ brew install k8sgpt
   <!---x-release-please-start-version-->
 
 ```
-curl -LO https://github.com/k8sgpt-ai/k8sgpt/releases/download/v0.4.27/k8sgpt_386.deb
+curl -LO https://github.com/k8sgpt-ai/k8sgpt/releases/download/v0.4.30/k8sgpt_386.deb
 sudo dpkg -i k8sgpt_386.deb
 ```
 
@@ -95,7 +99,7 @@ sudo dpkg -i k8sgpt_386.deb
   <!---x-release-please-start-version-->
 
 ```
-curl -LO https://github.com/k8sgpt-ai/k8sgpt/releases/download/v0.4.27/k8sgpt_amd64.deb
+curl -LO https://github.com/k8sgpt-ai/k8sgpt/releases/download/v0.4.30/k8sgpt_amd64.deb
 sudo dpkg -i k8sgpt_amd64.deb
 ```
 
@@ -110,7 +114,7 @@ sudo dpkg -i k8sgpt_amd64.deb
 
   <!---x-release-please-start-version-->
   ```
-  wget https://github.com/k8sgpt-ai/k8sgpt/releases/download/v0.4.27/k8sgpt_386.apk
+  wget https://github.com/k8sgpt-ai/k8sgpt/releases/download/v0.4.30/k8sgpt_386.apk
   apk add --allow-untrusted k8sgpt_386.apk
   ```
   <!---x-release-please-end-->
@@ -119,7 +123,7 @@ sudo dpkg -i k8sgpt_amd64.deb
 
   <!---x-release-please-start-version-->
   ```
-  wget https://github.com/k8sgpt-ai/k8sgpt/releases/download/v0.4.27/k8sgpt_amd64.apk
+  wget https://github.com/k8sgpt-ai/k8sgpt/releases/download/v0.4.30/k8sgpt_amd64.apk
   apk add --allow-untrusted k8sgpt_amd64.apk
   ```
   <!---x-release-please-end-->

cmd/serve/serve.go

@@ -203,6 +203,11 @@ var ServeCmd = &cobra.Command{
 			}()
 		}
 
+		// Allow metrics port to be overridden by environment variable
+		if envMetricsPort := os.Getenv("K8SGPT_METRICS_PORT"); envMetricsPort != "" && !cmd.Flags().Changed("metrics-port") {
+			metricsPort = envMetricsPort
+		}
+
 		server := k8sgptserver.Config{
 			Backend:     aiProvider.Name,
 			Port:        port,
@@ -234,7 +239,7 @@ var ServeCmd = &cobra.Command{
 func init() {
 	// add flag for backend
 	ServeCmd.Flags().StringVarP(&port, "port", "p", "8080", "Port to run the server on")
-	ServeCmd.Flags().StringVarP(&metricsPort, "metrics-port", "", "8081", "Port to run the metrics-server on")
+	ServeCmd.Flags().StringVarP(&metricsPort, "metrics-port", "m", "8081", "Port to run the metrics-server on (env: K8SGPT_METRICS_PORT)")
 	ServeCmd.Flags().StringVarP(&backend, "backend", "b", "openai", "Backend AI provider")
 	ServeCmd.Flags().BoolVarP(&enableHttp, "http", "", false, "Enable REST/http using gppc-gateway")
 	ServeCmd.Flags().BoolVarP(&enableMCP, "mcp", "", false, "Enable Mission Control Protocol server")

go.mod

@@ -282,7 +282,7 @@ require (
 	k8s.io/component-base v0.32.2 // indirect
 	k8s.io/klog/v2 v2.130.1 // indirect
 	k8s.io/kube-openapi v0.0.0-20241105132330-32ad38e42d3f // indirect
-	k8s.io/utils v0.0.0-20250604170112-4c0f3b243397
+	k8s.io/utils v0.0.0-20260210185600-b8788abfbbc2
 	oras.land/oras-go v1.2.5 // indirect
 	sigs.k8s.io/json v0.0.0-20241010143419-9aa6b5e7a4b3 // indirect
 	sigs.k8s.io/kustomize/api v0.18.0 // indirect

go.sum

@@ -2260,8 +2260,8 @@ k8s.io/kube-openapi v0.0.0-20241105132330-32ad38e42d3f h1:GA7//TjRY9yWGy1poLzYYJ
 k8s.io/kube-openapi v0.0.0-20241105132330-32ad38e42d3f/go.mod h1:R/HEjbvWI0qdfb8viZUeVZm0X6IZnxAydC7YU42CMw4=
 k8s.io/kubectl v0.32.2 h1:TAkag6+XfSBgkqK9I7ZvwtF0WVtUAvK8ZqTt+5zi1Us=
 k8s.io/kubectl v0.32.2/go.mod h1:+h/NQFSPxiDZYX/WZaWw9fwYezGLISP0ud8nQKg+3g8=
-k8s.io/utils v0.0.0-20250604170112-4c0f3b243397 h1:hwvWFiBzdWw1FhfY1FooPn3kzWuJ8tmbZBHi4zVsl1Y=
-k8s.io/utils v0.0.0-20250604170112-4c0f3b243397/go.mod h1:OLgZIPagt7ERELqWJFomSt595RzquPNLL48iOWgYOg0=
+k8s.io/utils v0.0.0-20260210185600-b8788abfbbc2 h1:AZYQSJemyQB5eRxqcPky+/7EdBj0xi3g0ZcxxJ7vbWU=
+k8s.io/utils v0.0.0-20260210185600-b8788abfbbc2/go.mod h1:xDxuJ0whA3d0I4mf/C4ppKHxXynQ+fxnkmQH0vTHnuk=
 knative.dev/pkg v0.0.0-20241026180704-25f6002b00f3 h1:uUSDGlOIkdPT4svjlhi+JEnP2Ufw7AM/F5QDYiEL02U=
 knative.dev/pkg v0.0.0-20241026180704-25f6002b00f3/go.mod h1:FeMbTLlxQqSASwlRCrYEOsZ0OKUgSj52qxhECwYCJsw=
 lukechampine.com/uint128 v1.1.1/go.mod h1:c4eWIwlEGaxC/+H1VguhU4PHXNWDCDMUlWdIWl2j1gk=

pkg/analysis/analysis.go

@@ -16,6 +16,7 @@ package analysis
 import (
 	"context"
 	"encoding/base64"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"reflect"
@@ -34,6 +35,7 @@ import (
 	"github.com/k8sgpt-ai/k8sgpt/pkg/util"
 	"github.com/schollz/progressbar/v3"
 	"github.com/spf13/viper"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
 type Analysis struct {
@@ -226,6 +228,15 @@ func (a *Analysis) CustomAnalyzersAreAvailable() bool {
 }
 
 func (a *Analysis) RunCustomAnalysis() {
+	// Validate namespace if specified, consistent with built-in filter behavior
+	if a.Namespace != "" && a.Client != nil {
+		_, err := a.Client.Client.CoreV1().Namespaces().Get(a.Context, a.Namespace, metav1.GetOptions{})
+		if err != nil {
+			a.Errors = append(a.Errors, fmt.Sprintf("namespace %q not found: %s", a.Namespace, err))
+			return
+		}
+	}
+
 	var customAnalyzers []custom.CustomAnalyzer
 	if err := viper.UnmarshalKey("custom_analyzers", &customAnalyzers); err != nil {
 		a.Errors = append(a.Errors, err.Error())
@@ -526,7 +537,22 @@ func (a *Analysis) getAIResultForSanitizedFailures(texts []string, promptTmpl st
 	// Process template.
 	prompt := fmt.Sprintf(strings.TrimSpace(promptTmpl), a.Language, inputKey)
 	if a.AIClient.GetName() == ai.CustomRestClientName {
-		prompt = fmt.Sprintf(ai.PromptMap["raw"], a.Language, inputKey, prompt)
+		// Use proper JSON marshaling to handle special characters in error messages
+		// This fixes issues with quotes, newlines, and other special chars in inputKey
+		customRestPrompt := struct {
+			Language string `json:"language"`
+			Message  string `json:"message"`
+			Prompt   string `json:"prompt"`
+		}{
+			Language: a.Language,
+			Message:  inputKey,
+			Prompt:   prompt,
+		}
+		promptBytes, err := json.Marshal(customRestPrompt)
+		if err != nil {
+			return "", fmt.Errorf("failed to marshal customrest prompt: %w", err)
+		}
+		prompt = string(promptBytes)
 	}
 	response, err := a.AIClient.GetCompletion(a.Context, prompt)
 	if err != nil {

pkg/server/mcp_handlers.go

@@ -29,148 +29,247 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
+const (
+	// DefaultListLimit is the default maximum number of resources to return
+	DefaultListLimit = 100
+	// MaxListLimit is the maximum allowed limit for list operations
+	MaxListLimit = 1000
+)
+
+// resourceLister defines a function that lists Kubernetes resources
+type resourceLister func(ctx context.Context, client *kubernetes.Client, namespace string, opts metav1.ListOptions) (interface{}, error)
+
+// resourceGetter defines a function that gets a single Kubernetes resource
+type resourceGetter func(ctx context.Context, client *kubernetes.Client, namespace, name string) (interface{}, error)
+
+// resourceRegistry maps resource types to their list and get functions
+var resourceRegistry = map[string]struct {
+	list resourceLister
+	get  resourceGetter
+}{
+	"pod": {
+		list: func(ctx context.Context, client *kubernetes.Client, namespace string, opts metav1.ListOptions) (interface{}, error) {
+			return client.Client.CoreV1().Pods(namespace).List(ctx, opts)
+		},
+		get: func(ctx context.Context, client *kubernetes.Client, namespace, name string) (interface{}, error) {
+			return client.Client.CoreV1().Pods(namespace).Get(ctx, name, metav1.GetOptions{})
+		},
+	},
+	"deployment": {
+		list: func(ctx context.Context, client *kubernetes.Client, namespace string, opts metav1.ListOptions) (interface{}, error) {
+			return client.Client.AppsV1().Deployments(namespace).List(ctx, opts)
+		},
+		get: func(ctx context.Context, client *kubernetes.Client, namespace, name string) (interface{}, error) {
+			return client.Client.AppsV1().Deployments(namespace).Get(ctx, name, metav1.GetOptions{})
+		},
+	},
+	"service": {
+		list: func(ctx context.Context, client *kubernetes.Client, namespace string, opts metav1.ListOptions) (interface{}, error) {
+			return client.Client.CoreV1().Services(namespace).List(ctx, opts)
+		},
+		get: func(ctx context.Context, client *kubernetes.Client, namespace, name string) (interface{}, error) {
+			return client.Client.CoreV1().Services(namespace).Get(ctx, name, metav1.GetOptions{})
+		},
+	},
+	"node": {
+		list: func(ctx context.Context, client *kubernetes.Client, namespace string, opts metav1.ListOptions) (interface{}, error) {
+			return client.Client.CoreV1().Nodes().List(ctx, opts)
+		},
+		get: func(ctx context.Context, client *kubernetes.Client, namespace, name string) (interface{}, error) {
+			return client.Client.CoreV1().Nodes().Get(ctx, name, metav1.GetOptions{})
+		},
+	},
+	"job": {
+		list: func(ctx context.Context, client *kubernetes.Client, namespace string, opts metav1.ListOptions) (interface{}, error) {
+			return client.Client.BatchV1().Jobs(namespace).List(ctx, opts)
+		},
+		get: func(ctx context.Context, client *kubernetes.Client, namespace, name string) (interface{}, error) {
+			return client.Client.BatchV1().Jobs(namespace).Get(ctx, name, metav1.GetOptions{})
+		},
+	},
+	"cronjob": {
+		list: func(ctx context.Context, client *kubernetes.Client, namespace string, opts metav1.ListOptions) (interface{}, error) {
+			return client.Client.BatchV1().CronJobs(namespace).List(ctx, opts)
+		},
+		get: func(ctx context.Context, client *kubernetes.Client, namespace, name string) (interface{}, error) {
+			return client.Client.BatchV1().CronJobs(namespace).Get(ctx, name, metav1.GetOptions{})
+		},
+	},
+	"statefulset": {
+		list: func(ctx context.Context, client *kubernetes.Client, namespace string, opts metav1.ListOptions) (interface{}, error) {
+			return client.Client.AppsV1().StatefulSets(namespace).List(ctx, opts)
+		},
+		get: func(ctx context.Context, client *kubernetes.Client, namespace, name string) (interface{}, error) {
+			return client.Client.AppsV1().StatefulSets(namespace).Get(ctx, name, metav1.GetOptions{})
+		},
+	},
+	"daemonset": {
+		list: func(ctx context.Context, client *kubernetes.Client, namespace string, opts metav1.ListOptions) (interface{}, error) {
+			return client.Client.AppsV1().DaemonSets(namespace).List(ctx, opts)
+		},
+		get: func(ctx context.Context, client *kubernetes.Client, namespace, name string) (interface{}, error) {
+			return client.Client.AppsV1().DaemonSets(namespace).Get(ctx, name, metav1.GetOptions{})
+		},
+	},
+	"replicaset": {
+		list: func(ctx context.Context, client *kubernetes.Client, namespace string, opts metav1.ListOptions) (interface{}, error) {
+			return client.Client.AppsV1().ReplicaSets(namespace).List(ctx, opts)
+		},
+		get: func(ctx context.Context, client *kubernetes.Client, namespace, name string) (interface{}, error) {
+			return client.Client.AppsV1().ReplicaSets(namespace).Get(ctx, name, metav1.GetOptions{})
+		},
+	},
+	"configmap": {
+		list: func(ctx context.Context, client *kubernetes.Client, namespace string, opts metav1.ListOptions) (interface{}, error) {
+			return client.Client.CoreV1().ConfigMaps(namespace).List(ctx, opts)
+		},
+		get: func(ctx context.Context, client *kubernetes.Client, namespace, name string) (interface{}, error) {
+			return client.Client.CoreV1().ConfigMaps(namespace).Get(ctx, name, metav1.GetOptions{})
+		},
+	},
+	"secret": {
+		list: func(ctx context.Context, client *kubernetes.Client, namespace string, opts metav1.ListOptions) (interface{}, error) {
+			return client.Client.CoreV1().Secrets(namespace).List(ctx, opts)
+		},
+		get: func(ctx context.Context, client *kubernetes.Client, namespace, name string) (interface{}, error) {
+			return client.Client.CoreV1().Secrets(namespace).Get(ctx, name, metav1.GetOptions{})
+		},
+	},
+	"ingress": {
+		list: func(ctx context.Context, client *kubernetes.Client, namespace string, opts metav1.ListOptions) (interface{}, error) {
+			return client.Client.NetworkingV1().Ingresses(namespace).List(ctx, opts)
+		},
+		get: func(ctx context.Context, client *kubernetes.Client, namespace, name string) (interface{}, error) {
+			return client.Client.NetworkingV1().Ingresses(namespace).Get(ctx, name, metav1.GetOptions{})
+		},
+	},
+	"persistentvolumeclaim": {
+		list: func(ctx context.Context, client *kubernetes.Client, namespace string, opts metav1.ListOptions) (interface{}, error) {
+			return client.Client.CoreV1().PersistentVolumeClaims(namespace).List(ctx, opts)
+		},
+		get: func(ctx context.Context, client *kubernetes.Client, namespace, name string) (interface{}, error) {
+			return client.Client.CoreV1().PersistentVolumeClaims(namespace).Get(ctx, name, metav1.GetOptions{})
+		},
+	},
+	"persistentvolume": {
+		list: func(ctx context.Context, client *kubernetes.Client, namespace string, opts metav1.ListOptions) (interface{}, error) {
+			return client.Client.CoreV1().PersistentVolumes().List(ctx, opts)
+		},
+		get: func(ctx context.Context, client *kubernetes.Client, namespace, name string) (interface{}, error) {
+			return client.Client.CoreV1().PersistentVolumes().Get(ctx, name, metav1.GetOptions{})
+		},
+	},
+}
+
+// Resource type aliases for convenience
+var resourceTypeAliases = map[string]string{
+	"pods":                      "pod",
+	"deployments":               "deployment",
+	"services":                  "service",
+	"svc":                       "service",
+	"nodes":                     "node",
+	"jobs":                      "job",
+	"cronjobs":                  "cronjob",
+	"statefulsets":              "statefulset",
+	"sts":                       "statefulset",
+	"daemonsets":                "daemonset",
+	"ds":                        "daemonset",
+	"replicasets":               "replicaset",
+	"rs":                        "replicaset",
+	"configmaps":                "configmap",
+	"cm":                        "configmap",
+	"secrets":                   "secret",
+	"ingresses":                 "ingress",
+	"ing":                       "ingress",
+	"persistentvolumeclaims":    "persistentvolumeclaim",
+	"pvc":                       "persistentvolumeclaim",
+	"persistentvolumes":         "persistentvolume",
+	"pv":                        "persistentvolume",
+}
+
+// normalizeResourceType converts resource type variants to canonical form
+func normalizeResourceType(resourceType string) (string, error) {
+	normalized := strings.ToLower(resourceType)
+	
+	// Check if it's an alias
+	if canonical, ok := resourceTypeAliases[normalized]; ok {
+		normalized = canonical
+	}
+	
+	// Check if it's a known resource type
+	if _, ok := resourceRegistry[normalized]; !ok {
+		return "", fmt.Errorf("unsupported resource type: %s", resourceType)
+	}
+	
+	return normalized, nil
+}
+
+// marshalJSON marshals data to JSON with proper error handling
+func marshalJSON(data interface{}) (string, error) {
+	jsonData, err := json.MarshalIndent(data, "", "  ")
+	if err != nil {
+		return "", fmt.Errorf("failed to marshal JSON: %w", err)
+	}
+	return string(jsonData), nil
+}
+
 // handleListResources lists Kubernetes resources of a specific type
 func (s *K8sGptMCPServer) handleListResources(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
 	var req struct {
 		ResourceType  string `json:"resourceType"`
 		Namespace     string `json:"namespace,omitempty"`
 		LabelSelector string `json:"labelSelector,omitempty"`
+		Limit         int64  `json:"limit,omitempty"`
 	}
 	if err := request.BindArguments(&req); err != nil {
 		return mcp.NewToolResultErrorf("Failed to parse request arguments: %v", err), nil
 	}
 
+	if req.ResourceType == "" {
+		return mcp.NewToolResultErrorf("resourceType is required"), nil
+	}
+
+	// Normalize and validate resource type
+	resourceType, err := normalizeResourceType(req.ResourceType)
+	if err != nil {
+		supportedTypes := make([]string, 0, len(resourceRegistry))
+		for key := range resourceRegistry {
+			supportedTypes = append(supportedTypes, key)
+		}
+		return mcp.NewToolResultErrorf("%v. Supported types: %v", err, supportedTypes), nil
+	}
+
+	// Set default and validate limit
+	if req.Limit == 0 {
+		req.Limit = DefaultListLimit
+	} else if req.Limit > MaxListLimit {
+		req.Limit = MaxListLimit
+	}
+
 	client, err := kubernetes.NewClient("", "")
 	if err != nil {
 		return mcp.NewToolResultErrorf("Failed to create Kubernetes client: %v", err), nil
 	}
 
-	listOptions := metav1.ListOptions{}
-	if req.LabelSelector != "" {
-		listOptions.LabelSelector = req.LabelSelector
+	listOptions := metav1.ListOptions{
+		LabelSelector: req.LabelSelector,
+		Limit:         req.Limit,
 	}
 
-	var result string
-	resourceType := strings.ToLower(req.ResourceType)
-
-	switch resourceType {
-	case "pod", "pods":
-		pods, err := client.Client.CoreV1().Pods(req.Namespace).List(ctx, listOptions)
-		if err != nil {
-			return mcp.NewToolResultErrorf("Failed to list pods: %v", err), nil
-		}
-		data, _ := json.MarshalIndent(pods.Items, "", "  ")
-		result = string(data)
-
-	case "deployment", "deployments":
-		deps, err := client.Client.AppsV1().Deployments(req.Namespace).List(ctx, listOptions)
-		if err != nil {
-			return mcp.NewToolResultErrorf("Failed to list deployments: %v", err), nil
-		}
-		data, _ := json.MarshalIndent(deps.Items, "", "  ")
-		result = string(data)
-
-	case "service", "services", "svc":
-		svcs, err := client.Client.CoreV1().Services(req.Namespace).List(ctx, listOptions)
-		if err != nil {
-			return mcp.NewToolResultErrorf("Failed to list services: %v", err), nil
-		}
-		data, _ := json.MarshalIndent(svcs.Items, "", "  ")
-		result = string(data)
-
-	case "node", "nodes":
-		nodes, err := client.Client.CoreV1().Nodes().List(ctx, listOptions)
-		if err != nil {
-			return mcp.NewToolResultErrorf("Failed to list nodes: %v", err), nil
-		}
-		data, _ := json.MarshalIndent(nodes.Items, "", "  ")
-		result = string(data)
-
-	case "job", "jobs":
-		jobs, err := client.Client.BatchV1().Jobs(req.Namespace).List(ctx, listOptions)
-		if err != nil {
-			return mcp.NewToolResultErrorf("Failed to list jobs: %v", err), nil
-		}
-		data, _ := json.MarshalIndent(jobs.Items, "", "  ")
-		result = string(data)
-
-	case "cronjob", "cronjobs":
-		cronjobs, err := client.Client.BatchV1().CronJobs(req.Namespace).List(ctx, listOptions)
-		if err != nil {
-			return mcp.NewToolResultErrorf("Failed to list cronjobs: %v", err), nil
-		}
-		data, _ := json.MarshalIndent(cronjobs.Items, "", "  ")
-		result = string(data)
-
-	case "statefulset", "statefulsets", "sts":
-		sts, err := client.Client.AppsV1().StatefulSets(req.Namespace).List(ctx, listOptions)
-		if err != nil {
-			return mcp.NewToolResultErrorf("Failed to list statefulsets: %v", err), nil
-		}
-		data, _ := json.MarshalIndent(sts.Items, "", "  ")
-		result = string(data)
-
-	case "daemonset", "daemonsets", "ds":
-		ds, err := client.Client.AppsV1().DaemonSets(req.Namespace).List(ctx, listOptions)
-		if err != nil {
-			return mcp.NewToolResultErrorf("Failed to list daemonsets: %v", err), nil
-		}
-		data, _ := json.MarshalIndent(ds.Items, "", "  ")
-		result = string(data)
-
-	case "replicaset", "replicasets", "rs":
-		rs, err := client.Client.AppsV1().ReplicaSets(req.Namespace).List(ctx, listOptions)
-		if err != nil {
-			return mcp.NewToolResultErrorf("Failed to list replicasets: %v", err), nil
-		}
-		data, _ := json.MarshalIndent(rs.Items, "", "  ")
-		result = string(data)
-
-	case "configmap", "configmaps", "cm":
-		cms, err := client.Client.CoreV1().ConfigMaps(req.Namespace).List(ctx, listOptions)
-		if err != nil {
-			return mcp.NewToolResultErrorf("Failed to list configmaps: %v", err), nil
-		}
-		data, _ := json.MarshalIndent(cms.Items, "", "  ")
-		result = string(data)
-
-	case "secret", "secrets":
-		secrets, err := client.Client.CoreV1().Secrets(req.Namespace).List(ctx, listOptions)
-		if err != nil {
-			return mcp.NewToolResultErrorf("Failed to list secrets: %v", err), nil
-		}
-		data, _ := json.MarshalIndent(secrets.Items, "", "  ")
-		result = string(data)
-
-	case "ingress", "ingresses", "ing":
-		ingresses, err := client.Client.NetworkingV1().Ingresses(req.Namespace).List(ctx, listOptions)
-		if err != nil {
-			return mcp.NewToolResultErrorf("Failed to list ingresses: %v", err), nil
-		}
-		data, _ := json.MarshalIndent(ingresses.Items, "", "  ")
-		result = string(data)
-
-	case "persistentvolumeclaim", "persistentvolumeclaims", "pvc":
-		pvcs, err := client.Client.CoreV1().PersistentVolumeClaims(req.Namespace).List(ctx, listOptions)
-		if err != nil {
-			return mcp.NewToolResultErrorf("Failed to list PVCs: %v", err), nil
-		}
-		data, _ := json.MarshalIndent(pvcs.Items, "", "  ")
-		result = string(data)
-
-	case "persistentvolume", "persistentvolumes", "pv":
-		pvs, err := client.Client.CoreV1().PersistentVolumes().List(ctx, listOptions)
-		if err != nil {
-			return mcp.NewToolResultErrorf("Failed to list PVs: %v", err), nil
-		}
-		data, _ := json.MarshalIndent(pvs.Items, "", "  ")
-		result = string(data)
-
-	default:
-		return mcp.NewToolResultErrorf("Unsupported resource type: %s. Supported types: pods, deployments, services, nodes, jobs, cronjobs, statefulsets, daemonsets, replicasets, configmaps, secrets, ingresses, pvc, pv", resourceType), nil
+	// Get the list function from registry
+	listFunc := resourceRegistry[resourceType].list
+	result, err := listFunc(ctx, client, req.Namespace, listOptions)
+	if err != nil {
+		return mcp.NewToolResultErrorf("Failed to list %s: %v", resourceType, err), nil
 	}
 
-	return mcp.NewToolResultText(result), nil
+	// Extract items from the result (all list types have an Items field)
+	resultJSON, err := marshalJSON(result)
+	if err != nil {
+		return mcp.NewToolResultErrorf("Failed to serialize result: %v", err), nil
+	}
+
+	return mcp.NewToolResultText(resultJSON), nil
 }
 
 // handleGetResource gets detailed information about a specific resource
@@ -184,52 +283,37 @@ func (s *K8sGptMCPServer) handleGetResource(ctx context.Context, request mcp.Cal
 		return mcp.NewToolResultErrorf("Failed to parse request arguments: %v", err), nil
 	}
 
+	if req.ResourceType == "" {
+		return mcp.NewToolResultErrorf("resourceType is required"), nil
+	}
+	if req.Name == "" {
+		return mcp.NewToolResultErrorf("name is required"), nil
+	}
+
+	// Normalize and validate resource type
+	resourceType, err := normalizeResourceType(req.ResourceType)
+	if err != nil {
+		return mcp.NewToolResultErrorf("%v", err), nil
+	}
+
 	client, err := kubernetes.NewClient("", "")
 	if err != nil {
 		return mcp.NewToolResultErrorf("Failed to create Kubernetes client: %v", err), nil
 	}
 
-	var result string
-	resourceType := strings.ToLower(req.ResourceType)
-
-	switch resourceType {
-	case "pod", "pods":
-		pod, err := client.Client.CoreV1().Pods(req.Namespace).Get(ctx, req.Name, metav1.GetOptions{})
-		if err != nil {
-			return mcp.NewToolResultErrorf("Failed to get pod: %v", err), nil
-		}
-		data, _ := json.MarshalIndent(pod, "", "  ")
-		result = string(data)
-
-	case "deployment", "deployments":
-		dep, err := client.Client.AppsV1().Deployments(req.Namespace).Get(ctx, req.Name, metav1.GetOptions{})
-		if err != nil {
-			return mcp.NewToolResultErrorf("Failed to get deployment: %v", err), nil
-		}
-		data, _ := json.MarshalIndent(dep, "", "  ")
-		result = string(data)
-
-	case "service", "services", "svc":
-		svc, err := client.Client.CoreV1().Services(req.Namespace).Get(ctx, req.Name, metav1.GetOptions{})
-		if err != nil {
-			return mcp.NewToolResultErrorf("Failed to get service: %v", err), nil
-		}
-		data, _ := json.MarshalIndent(svc, "", "  ")
-		result = string(data)
-
-	case "node", "nodes":
-		node, err := client.Client.CoreV1().Nodes().Get(ctx, req.Name, metav1.GetOptions{})
-		if err != nil {
-			return mcp.NewToolResultErrorf("Failed to get node: %v", err), nil
-		}
-		data, _ := json.MarshalIndent(node, "", "  ")
-		result = string(data)
-
-	default:
-		return mcp.NewToolResultErrorf("Unsupported resource type: %s", resourceType), nil
+	// Get the get function from registry
+	getFunc := resourceRegistry[resourceType].get
+	result, err := getFunc(ctx, client, req.Namespace, req.Name)
+	if err != nil {
+		return mcp.NewToolResultErrorf("Failed to get %s '%s': %v", resourceType, req.Name, err), nil
 	}
 
-	return mcp.NewToolResultText(result), nil
+	resultJSON, err := marshalJSON(result)
+	if err != nil {
+		return mcp.NewToolResultErrorf("Failed to serialize result: %v", err), nil
+	}
+
+	return mcp.NewToolResultText(resultJSON), nil
 }
 
 // handleListNamespaces lists all namespaces in the cluster
@@ -244,24 +328,30 @@ func (s *K8sGptMCPServer) handleListNamespaces(ctx context.Context, request mcp.
 		return mcp.NewToolResultErrorf("Failed to list namespaces: %v", err), nil
 	}
 
-	data, _ := json.MarshalIndent(namespaces.Items, "", "  ")
-	return mcp.NewToolResultText(string(data)), nil
+	resultJSON, err := marshalJSON(namespaces.Items)
+	if err != nil {
+		return mcp.NewToolResultErrorf("Failed to serialize result: %v", err), nil
+	}
+
+	return mcp.NewToolResultText(resultJSON), nil
 }
 
 // handleListEvents lists Kubernetes events
 func (s *K8sGptMCPServer) handleListEvents(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
 	var req struct {
-		Namespace           string `json:"namespace,omitempty"`
-		InvolvedObjectName  string `json:"involvedObjectName,omitempty"`
-		InvolvedObjectKind  string `json:"involvedObjectKind,omitempty"`
-		Limit               int64  `json:"limit,omitempty"`
+		Namespace          string `json:"namespace,omitempty"`
+		InvolvedObjectName string `json:"involvedObjectName,omitempty"`
+		InvolvedObjectKind string `json:"involvedObjectKind,omitempty"`
+		Limit              int64  `json:"limit,omitempty"`
 	}
 	if err := request.BindArguments(&req); err != nil {
 		return mcp.NewToolResultErrorf("Failed to parse request arguments: %v", err), nil
 	}
 
 	if req.Limit == 0 {
-		req.Limit = 100
+		req.Limit = DefaultListLimit
+	} else if req.Limit > MaxListLimit {
+		req.Limit = MaxListLimit
 	}
 
 	client, err := kubernetes.NewClient("", "")
@@ -290,8 +380,12 @@ func (s *K8sGptMCPServer) handleListEvents(ctx context.Context, request mcp.Call
 		filteredEvents = append(filteredEvents, event)
 	}
 
-	data, _ := json.MarshalIndent(filteredEvents, "", "  ")
-	return mcp.NewToolResultText(string(data)), nil
+	resultJSON, err := marshalJSON(filteredEvents)
+	if err != nil {
+		return mcp.NewToolResultErrorf("Failed to serialize result: %v", err), nil
+	}
+
+	return mcp.NewToolResultText(resultJSON), nil
 }
 
 // handleGetLogs retrieves logs from a pod container
@@ -308,6 +402,13 @@ func (s *K8sGptMCPServer) handleGetLogs(ctx context.Context, request mcp.CallToo
 		return mcp.NewToolResultErrorf("Failed to parse request arguments: %v", err), nil
 	}
 
+	if req.PodName == "" {
+		return mcp.NewToolResultErrorf("podName is required"), nil
+	}
+	if req.Namespace == "" {
+		return mcp.NewToolResultErrorf("namespace is required"), nil
+	}
+
 	if req.TailLines == 0 {
 		req.TailLines = 100
 	}
@@ -356,8 +457,12 @@ func (s *K8sGptMCPServer) handleListFilters(ctx context.Context, request mcp.Cal
 		"activeFilters":      active,
 	}
 
-	data, _ := json.MarshalIndent(result, "", "  ")
-	return mcp.NewToolResultText(string(data)), nil
+	resultJSON, err := marshalJSON(result)
+	if err != nil {
+		return mcp.NewToolResultErrorf("Failed to serialize result: %v", err), nil
+	}
+
+	return mcp.NewToolResultText(resultJSON), nil
 }
 
 // handleAddFilters adds filters to enable specific analyzers
@@ -369,10 +474,17 @@ func (s *K8sGptMCPServer) handleAddFilters(ctx context.Context, request mcp.Call
 		return mcp.NewToolResultErrorf("Failed to parse request arguments: %v", err), nil
 	}
 
+	if len(req.Filters) == 0 {
+		return mcp.NewToolResultErrorf("filters array is required and cannot be empty"), nil
+	}
+
 	activeFilters := viper.GetStringSlice("active_filters")
+	addedFilters := []string{}
+	
 	for _, filter := range req.Filters {
 		if !contains(activeFilters, filter) {
 			activeFilters = append(activeFilters, filter)
+			addedFilters = append(addedFilters, filter)
 		}
 	}
 
@@ -381,7 +493,11 @@ func (s *K8sGptMCPServer) handleAddFilters(ctx context.Context, request mcp.Call
 		return mcp.NewToolResultErrorf("Failed to save configuration: %v", err), nil
 	}
 
-	return mcp.NewToolResultText(fmt.Sprintf("Successfully added filters: %v", req.Filters)), nil
+	if len(addedFilters) == 0 {
+		return mcp.NewToolResultText("All specified filters were already active"), nil
+	}
+
+	return mcp.NewToolResultText(fmt.Sprintf("Successfully added filters: %v", addedFilters)), nil
 }
 
 // handleRemoveFilters removes filters to disable specific analyzers
@@ -393,11 +509,19 @@ func (s *K8sGptMCPServer) handleRemoveFilters(ctx context.Context, request mcp.C
 		return mcp.NewToolResultErrorf("Failed to parse request arguments: %v", err), nil
 	}
 
+	if len(req.Filters) == 0 {
+		return mcp.NewToolResultErrorf("filters array is required and cannot be empty"), nil
+	}
+
 	activeFilters := viper.GetStringSlice("active_filters")
 	newFilters := []string{}
+	removedFilters := []string{}
+	
 	for _, filter := range activeFilters {
 		if !contains(req.Filters, filter) {
 			newFilters = append(newFilters, filter)
+		} else {
+			removedFilters = append(removedFilters, filter)
 		}
 	}
 
@@ -406,7 +530,11 @@ func (s *K8sGptMCPServer) handleRemoveFilters(ctx context.Context, request mcp.C
 		return mcp.NewToolResultErrorf("Failed to save configuration: %v", err), nil
 	}
 
-	return mcp.NewToolResultText(fmt.Sprintf("Successfully removed filters: %v", req.Filters)), nil
+	if len(removedFilters) == 0 {
+		return mcp.NewToolResultText("None of the specified filters were active"), nil
+	}
+
+	return mcp.NewToolResultText(fmt.Sprintf("Successfully removed filters: %v", removedFilters)), nil
 }
 
 // handleListIntegrations lists available integrations
@@ -423,8 +551,12 @@ func (s *K8sGptMCPServer) handleListIntegrations(ctx context.Context, request mc
 		})
 	}
 
-	data, _ := json.MarshalIndent(result, "", "  ")
-	return mcp.NewToolResultText(string(data)), nil
+	resultJSON, err := marshalJSON(result)
+	if err != nil {
+		return mcp.NewToolResultErrorf("Failed to serialize result: %v", err), nil
+	}
+
+	return mcp.NewToolResultText(resultJSON), nil
 }
 
 // contains checks if a string slice contains a specific string