Add metrics for MCP

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

@@ -4,7 +4,7 @@
 
 import { configstore } from "./configstore";
 import { logger } from "./logger";
 const pkg = require("../package.json");
 
 type cliEventNames =
   | "command_execution"
@@ -18,7 +18,9 @@
   | "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;
@@ -66,7 +68,7 @@
     value: process.version,
   },
   cli_version: {
     value: pkg.version,
   },
   firepit_version: {
     value: process.env.FIREPIT_VERSION || "none",
@@ -104,10 +106,10 @@
   [key: string]: string | number | undefined;
 }
 
 export async function trackGA4(
   eventName: cliEventNames,
   params: AnalyticsParams,
   duration: number = 1, // Default to 1ms duration so that events show up in realtime view.
 ): Promise<void> {
   const session = cliSession();
   if (!session) {
@@ -123,7 +125,7 @@
 }
 
 /**
  * Record an emulator-related event for Analytics.
  *
  * @param eventName the event name in snake_case. (Formal requirement:
  *                  length <= 40, alpha-numeric characters and underscores only
@@ -157,7 +159,7 @@
 }
 
 /**
  * Record a vscode-related event for Analytics.
  *
  * @param eventName the event name in snake_case. (Formal requirement:
  *                  length <= 40, alpha-numeric characters and underscores only
@@ -302,11 +304,11 @@
   commandName?: string;
 }
 
 export function emulatorSession(): AnalyticsSession | undefined {
   return session("emulator");
 }
 
 export function vscodeSession(): AnalyticsSession | undefined {
   return session("vscode");
 }