Improving error messages and adding postinstall script for ui

evals-cli/README.md

@@ -42,6 +42,8 @@ The project is structured as follows:
     ```bash
     npm install
     ```
+
+    *Note: This will also automatically install dependencies for the `ui` sub-project via a `postinstall` script.*
 
 2.  **Configure Environment**
 

evals-cli/package.json

@@ -5,6 +5,7 @@
   "license": "Apache-2.0",
   "type": "module",
   "scripts": {
+    "postinstall": "npm install --prefix ui",
     "build": "tsc",
     "test": "tsc && node --test dist/test/matcher.test.js",
     "serve": "tsc && npm run build --prefix ui && node dist/bin/serve.js"

evals-cli/src/evaluator/browser.ts

@@ -102,7 +102,7 @@ export async function listToolsFromPage(url: string): Promise<Tool[]> {
 
     if (rawTools === null) {
       throw new Error(
-        "The WebMCP API (window.navigator.modelContext or modelContextTesting) is not available on this page.\n" +
+        "The WebMCP API (window.navigator.modelContextTesting) is not available on this page.\n" +
           "Please ensure:\n" +
           "  1. You are using Chrome Canary version 146 or later.\n" +
           "  2. The flag chrome://flags/#enable-webmcp-testing is enabled.\n" +
@@ -113,7 +113,7 @@ export async function listToolsFromPage(url: string): Promise<Tool[]> {
     if (!Array.isArray(rawTools) || rawTools.length === 0) {
       throw new Error(
         `The WebMCP API returned no tools from ${url}. ` +
-        "Ensure the page exposes tools via modelContext.listTools().",
+        "Ensure the page exposes tools via modelContextTesting.listTools().",
       );
     }