Add metrics for MCP (#8497)

* Add metrics for MCP

* check iserror field as well

* format

* format

Author: joehan

src/mcp/index.ts

@@ -18,6 +18,7 @@ import { requireAuth } from "../requireAuth.js";
 import { Options } from "../options.js";
 import { getProjectId } from "../projectUtils.js";
 import { mcpAuthError, NO_PROJECT_ERROR } from "./errors.js";
+import { trackGA4 } from "../track.js";
 import { Config } from "../config.js";
 
 const SERVER_VERSION = "0.0.1";
@@ -62,6 +63,7 @@ export class FirebaseMcpServer {
 
   async mcpListTools(): Promise<ListToolsResult> {
     const hasActiveProject = !!(await this.getProjectId());
+    await trackGA4("mcp_list_tools", {});
     return {
       tools: this.availableTools.map((t) => t.mcp),
       _meta: {
@@ -117,8 +119,15 @@ export class FirebaseMcpServer {
 
     try {
       const config = Config.load({ cwd: this.projectRoot });
-      return tool.fn(toolArgs, { projectId: await this.getProjectId(), host: this, config });
+      const res = await tool.fn(toolArgs, {
+        projectId: await this.getProjectId(),
+        host: this,
+        config,
+      });
+      await trackGA4("mcp_tool_call", { tool_name: toolName, error: res.isError ? 1 : 0 });
+      return res;
     } catch (err: unknown) {
+      await trackGA4("mcp_tool_call", { tool_name: toolName, error: 1 });
       return mcpError(err);
     }
   }

src/track.ts

@@ -18,7 +18,9 @@ type cliEventNames =
   | "extensions_emulated"
   | "function_deploy"
   | "codebase_deploy"
-  | "function_deploy_group";
+  | "function_deploy_group"
+  | "mcp_tool_call"
+  | "mcp_list_tools";
 type GA4Property = "cli" | "emulator" | "vscode";
 interface GA4Info {
   measurementId: string;