diff --git a/pkg/karmadactl/get.go b/pkg/karmadactl/get.go
index ffbabc6a2..7750cc9c9 100644
--- a/pkg/karmadactl/get.go
+++ b/pkg/karmadactl/get.go
@@ -90,7 +90,7 @@ func NewCmdGet(karmadaConfig KarmadaConfig, parentCommand string) *cobra.Command
 	cmd.Flags().StringVarP(&o.Namespace, "namespace", "n", "default", "-n=namespace or -n namespace")
 	cmd.Flags().StringVarP(&o.LabelSelector, "labels", "l", "", "-l=label or -l label")
 	cmd.Flags().StringSliceVarP(&o.Clusters, "clusters", "C", []string{}, "-C=member1,member2")
-	cmd.Flags().StringVar(&o.ClusterNamespace, "cluster-namespace", options.DefaultKarmadaClusterNamespace, "Namespace in the control plane where member cluster are stored.")
+	cmd.Flags().StringVar(&o.ClusterNamespace, "cluster-namespace", options.DefaultKarmadaClusterNamespace, "Namespace in the control plane where member cluster secrets are stored.")
 	cmd.Flags().BoolVarP(&o.AllNamespaces, "all-namespaces", "A", o.AllNamespaces, "If present, list the requested object(s) across all namespaces. Namespace in current context is ignored even if specified with --namespace.")
 	cmd.Flags().BoolVar(&o.IgnoreNotFound, "ignore-not-found", o.IgnoreNotFound, "If the requested object does not exist the command will return exit code 0.")
 	cmd.Flags().BoolVarP(&o.Watch, "watch", "w", o.Watch, "After listing/getting the requested object, watch for changes. Uninitialized objects are excluded if no object name is provided.")
diff --git a/pkg/karmadactl/join.go b/pkg/karmadactl/join.go
index 0cbbf544a..8815c86ce 100644
--- a/pkg/karmadactl/join.go
+++ b/pkg/karmadactl/join.go
@@ -143,7 +143,7 @@ func (j *CommandJoinOption) Validate() error {
 func (j *CommandJoinOption) AddFlags(flags *pflag.FlagSet) {
 	j.GlobalCommandOptions.AddFlags(flags)
 
-	flags.StringVar(&j.ClusterNamespace, "cluster-namespace", options.DefaultKarmadaClusterNamespace, "Namespace in the control plane where member secrets cluster are stored.")
+	flags.StringVar(&j.ClusterNamespace, "cluster-namespace", options.DefaultKarmadaClusterNamespace, "Namespace in the control plane where member cluster secrets are stored.")
 
 	flags.StringVar(&j.ClusterContext, "cluster-context", "",
 		"Context name of cluster in kubeconfig. Only works when there are multiple contexts in the kubeconfig.")
diff --git a/pkg/karmadactl/promote.go b/pkg/karmadactl/promote.go
index 81fbc0f33..c4aa8efd4 100644
--- a/pkg/karmadactl/promote.go
+++ b/pkg/karmadactl/promote.go
@@ -129,7 +129,7 @@ func (o *CommandPromoteOption) AddFlags(flags *pflag.FlagSet) {
 
 	flags.StringVarP(&o.Namespace, "namespace", "n", "default", "-n=namespace or -n namespace")
 	flags.StringVarP(&o.Cluster, "cluster", "c", "", "the name of legacy cluster (eg -c=member1)")
-	flags.StringVar(&o.ClusterNamespace, "cluster-namespace", options.DefaultKarmadaClusterNamespace, "Namespace in the control plane where member cluster are stored.")
+	flags.StringVar(&o.ClusterNamespace, "cluster-namespace", options.DefaultKarmadaClusterNamespace, "Namespace in the control plane where member cluster secrets are stored.")
 	flags.StringVar(&o.ClusterContext, "cluster-context", "",
 		"Context name of legacy cluster in kubeconfig. Only works when there are multiple contexts in the kubeconfig.")
 	flags.StringVar(&o.ClusterKubeConfig, "cluster-kubeconfig", "",
diff --git a/pkg/karmadactl/unjoin.go b/pkg/karmadactl/unjoin.go
index 40b4b5d64..ac50afa35 100644
--- a/pkg/karmadactl/unjoin.go
+++ b/pkg/karmadactl/unjoin.go
@@ -122,7 +122,7 @@ func (j *CommandUnjoinOption) Validate() error {
 func (j *CommandUnjoinOption) AddFlags(flags *pflag.FlagSet) {
 	j.GlobalCommandOptions.AddFlags(flags)
 
-	flags.StringVar(&j.ClusterNamespace, "cluster-namespace", options.DefaultKarmadaClusterNamespace, "Namespace in the control plane where member cluster are stored.")
+	flags.StringVar(&j.ClusterNamespace, "cluster-namespace", options.DefaultKarmadaClusterNamespace, "Namespace in the control plane where member cluster secrets are stored.")
 	flags.StringVar(&j.ClusterContext, "cluster-context", "",
 		"Context name of cluster in kubeconfig. Only works when there are multiple contexts in the kubeconfig.")
 	flags.StringVar(&j.ClusterKubeConfig, "cluster-kubeconfig", "",