diff --git a/pkg/github/__toolsnaps__/label_write.snap b/pkg/github/__toolsnaps__/label_write.snap
index 6eeb9fd73..e9fdcf0d8 100644
--- a/pkg/github/__toolsnaps__/label_write.snap
+++ b/pkg/github/__toolsnaps__/label_write.snap
@@ -1,5 +1,6 @@
 {
   "annotations": {
+    "destructiveHint": true,
     "idempotentHint": false,
     "readOnlyHint": false,
     "title": "Write operations on repository labels"
diff --git a/pkg/github/labels.go b/pkg/github/labels.go
index 0e4996849..29ae3d532 100644
--- a/pkg/github/labels.go
+++ b/pkg/github/labels.go
@@ -226,8 +226,9 @@ func LabelWrite(t translations.TranslationHelperFunc) inventory.ServerTool {
 			Name:        "label_write",
 			Description: t("TOOL_LABEL_WRITE_DESCRIPTION", "Perform write operations on repository labels. To set labels on issues, use the 'update_issue' tool."),
 			Annotations: &mcp.ToolAnnotations{
-				Title:        t("TOOL_LABEL_WRITE_TITLE", "Write operations on repository labels"),
-				ReadOnlyHint: false,
+				Title:           t("TOOL_LABEL_WRITE_TITLE", "Write operations on repository labels"),
+				ReadOnlyHint:    false,
+				DestructiveHint: jsonschema.Ptr(true),
 			},
 			InputSchema: &jsonschema.Schema{
 				Type: "object",
diff --git a/pkg/github/labels_test.go b/pkg/github/labels_test.go
index 88102ba3c..4407b4b4a 100644
--- a/pkg/github/labels_test.go
+++ b/pkg/github/labels_test.go
@@ -247,6 +247,10 @@ func TestWriteLabel(t *testing.T) {
 	assert.Equal(t, "label_write", tool.Name)
 	assert.NotEmpty(t, tool.Description)
 	assert.False(t, tool.Annotations.ReadOnlyHint, "label_write tool should not be read-only")
+	// label_write can delete a label repo-wide (removing it from every issue/PR),
+	// so clients must treat the tool as destructive and confirm before running it.
+	require.NotNil(t, tool.Annotations.DestructiveHint, "label_write should set DestructiveHint")
+	assert.True(t, *tool.Annotations.DestructiveHint, "label_write should be destructive")
 
 	tests := []struct {
 		name               string