chore: MCP-248 add search index info in debug resource

Author: himanshusinghs

src/resources/common/debug.ts

@@ -56,13 +56,15 @@ export class DebugResource extends ReactiveResource<
         }
     }
 
-    toOutput(): string {
+    async toOutput(): Promise<string> {
         let result = "";
 
         switch (this.current.tag) {
-            case "connected":
-                result += "The user is connected to the MongoDB cluster.";
+            case "connected": {
+                const searchIndexesSupported = await this.session.isSearchIndexSupported();
+                result += `The user is connected to the MongoDB cluster${searchIndexesSupported ? " with support for search indexes." : ""}.`;
                 break;
+            }
             case "errored":
                 result += `The user is not connected to a MongoDB cluster because of an error.\n`;
                 if (this.current.connectedAtlasCluster) {

src/resources/resource.ts

@@ -73,10 +73,10 @@ export abstract class ReactiveResource<Value, RelevantEvents extends readonly (k
         this.server.mcpServer.registerResource(this.name, this.uri, this.resourceConfig, this.resourceCallback);
     }
 
-    private resourceCallback: ReadResourceCallback = (uri) => ({
+    private resourceCallback: ReadResourceCallback = async (uri) => ({
         contents: [
             {
-                text: this.toOutput(),
+                text: await this.toOutput(),
                 mimeType: "application/json",
                 uri: uri.href,
             },
@@ -101,5 +101,5 @@ export abstract class ReactiveResource<Value, RelevantEvents extends readonly (k
     }
 
     protected abstract reduce(eventName: RelevantEvents[number], ...event: PayloadOf<RelevantEvents[number]>[]): Value;
-    public abstract toOutput(): string;
+    public abstract toOutput(): string | Promise<string>;
 }