diff --git a/tools/cache/listers.go b/tools/cache/listers.go
index 420ca7b2..a60f4494 100644
--- a/tools/cache/listers.go
+++ b/tools/cache/listers.go
@@ -30,7 +30,7 @@ import (
 // AppendFunc is used to add a matching item to whatever list the caller is using
 type AppendFunc func(interface{})
 
-// ListAll calls appendFn with each value retrieved from store which matches the selector.
+// ListAll lists items in the store matching the given selector, calling appendFn on each one.
 func ListAll(store Store, selector labels.Selector, appendFn AppendFunc) error {
 	selectAll := selector.Empty()
 	for _, m := range store.List() {
@@ -51,7 +51,9 @@ func ListAll(store Store, selector labels.Selector, appendFn AppendFunc) error {
 	return nil
 }
 
-// ListAllByNamespace used to list items belongs to namespace from Indexer.
+// ListAllByNamespace lists items in the given namespace in the store matching the given selector,
+// calling appendFn on each one.
+// If a blank namespace (NamespaceAll) is specified, this delegates to ListAll().
 func ListAllByNamespace(indexer Indexer, namespace string, selector labels.Selector, appendFn AppendFunc) error {
 	if namespace == metav1.NamespaceAll {
 		return ListAll(indexer, selector, appendFn)