feat: add health_check tool

Author: Killusions

index.ts

@@ -160,6 +160,7 @@ import {
   type GetRepositoryTreeOptions,
   GetRepositoryTreeSchema,
   GetUsersSchema,
+  HealthCheckSchema,
   GetWikiPageSchema,
   type GitLabCommit,
   GitLabCommitSchema,
@@ -10341,6 +10342,39 @@ async function handleToolCall(params: any) {
         };
       }
 
+      case "health_check": {
+        HealthCheckSchema.parse(params.arguments);
+        const url = new URL(`${GITLAB_API_URL}/projects?per_page=1`);
+
+        try {
+          const response = await fetch(url.toString(), {
+            ...getFetchConfig(),
+          });
+
+          const authenticated = response.ok;
+          const result = {
+            status: authenticated ? "ok" : "error",
+            authenticated,
+            gitlab_url: GITLAB_API_URL,
+          };
+
+          return {
+            content: [{ type: "text", text: JSON.stringify(result, null, 2) }],
+          };
+        } catch (error) {
+          const result = {
+            status: "error",
+            authenticated: false,
+            gitlab_url: GITLAB_API_URL,
+            error: error instanceof Error ? error.message : "Unknown error",
+          };
+
+          return {
+            content: [{ type: "text", text: JSON.stringify(result, null, 2) }],
+          };
+        }
+      }
+
       default:
         throw new Error(`Unknown tool: ${params.name}`);
     }

schemas.ts

@@ -550,6 +550,9 @@ export const GitLabUsersResponseSchema = z.record(
     .nullable()
 );
 
+// Health check schema
+export const HealthCheckSchema = z.object({});
+
 // Namespace related schemas
 
 // Base schema for project-related operations

tools/registry.ts

@@ -109,6 +109,7 @@ import {
   GetTagSignatureSchema,
   GetTimelineEventsSchema,
   GetUsersSchema,
+  HealthCheckSchema,
   GetWebhookEventSchema,
   GetWikiPageSchema,
   GetWorkItemSchema,
@@ -594,6 +595,11 @@ export const allTools = [
     description: "List projects in a group",
     inputSchema: toJSONSchema(ListGroupProjectsSchema),
   },
+  {
+    name: "health_check",
+    description: "Verify server status and authentication",
+    inputSchema: toJSONSchema(HealthCheckSchema),
+  },
   {
     name: "list_wiki_pages",
     description: "List wiki pages in a project",