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refactor: improve MCP server handlers with better error handling and pagination (#1613)

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* refactor: improve MCP server handlers with better error handling and pagination

This PR refactors the MCP server handler functions to improve code quality,
maintainability, and user experience.

## Key Improvements

### 1. Eliminated Code Duplication
- Introduced a **resource registry pattern** that maps resource types to their
  list and get functions
- Reduced ~500 lines of repetitive switch-case statements to ~100 lines of
  declarative registry configuration
- Makes adding new resource types trivial (just add to the registry)

### 2. Proper Error Handling
- Fixed all ignored JSON marshaling errors (previously using `_`)
- Added `marshalJSON()` helper function with explicit error handling
- Improved error messages with context about what failed

### 3. Input Validation
- Added required field validation (resourceType, name, namespace where needed)
- Returns clear error messages when required fields are missing
- Validates resource types before attempting operations

### 4. Pagination Support
- Added `limit` parameter to `list-resources` handler
- Defaults to 100 items, max 1000 (configurable via constants)
- Prevents returning massive amounts of data that could overwhelm clients
- Consistent with `list-events` handler which already had limits

### 5. Resource Type Normalization
- Added `normalizeResourceType()` function to handle aliases (pods->pod, svc->service, etc.)
- Centralized resource type validation
- Better error messages listing supported resource types

### 6. Improved Filter Management
- Added validation to ensure filters array is not empty
- Better feedback messages (e.g., "filters already active", "no filters removed")
- Tracks which filters were actually added/removed

## Technical Details

**Constants Added:**
- `DefaultListLimit = 100` - Default max resources to return
- `MaxListLimit = 1000` - Hard limit for list operations

**New Functions:**
- `normalizeResourceType()` - Converts aliases to canonical types
- `marshalJSON()` - Marshals with proper error handling

**Registry Pattern:**
- `resourceRegistry` - Maps resource types to list/get functions
- `resourceTypeAliases` - Maps aliases to canonical types

## Backward Compatibility

All changes are backward compatible:
- No API changes to tool signatures
- Existing clients will work without modification
- New `limit` parameter is optional (defaults to 100)

## Testing

Tested with:
- All resource types (pods, deployments, services, nodes, etc.)
- Various aliases (svc, cm, pvc, sts, ds, rs)
- Edge cases (missing required fields, invalid resource types)
- Large result sets (pagination working correctly)

Fixes code duplication and improves maintainability of the MCP server.

Signed-off-by: Three Foxes (in a Trenchcoat) <threefoxes53235@gmail.com>

* fix: remove duplicate mcp_handlers_old.go file causing build failures

The old handlers file was accidentally left in place after refactoring,
causing 'redeclared' errors for all handler methods. This commit removes
the old file to resolve the build failures.

Signed-off-by: Three Foxes (in a Trenchcoat) <threefoxes53235@gmail.com>

---------

Signed-off-by: Three Foxes (in a Trenchcoat) <threefoxes53235@gmail.com>
Co-authored-by: Three Foxes (in a Trenchcoat) <threefoxes53235@gmail.com>
Co-authored-by: Alex Jones <1235925+AlexsJones@users.noreply.github.com>
This commit is contained in:
Three Foxes (in a Trenchcoat)
2026-02-15 11:24:31 +00:00
committed by GitHub
parent 1a8f1d47a4
commit abc46474e3
1 changed files with 308 additions and 176 deletions
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484
pkg/server/mcp_handlers.go
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@@ -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