@W-19251796 MCP a11y performance tool format fix (#3003)

Author: patricksullivansf

packages/pwa-kit-mcp/CHANGELOG.md

@@ -5,4 +5,5 @@
 - Add `create_app_guidelines` MCP tool. [#2599](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/2599)
 - Add `run_site_test` MCP tool [#2645](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/2645):
 - Add `create_sample_storefront_page` MCP tool [#2899] (https://github.com/SalesforceCommerceCloud/pwa-kit/pull/2899)
-- fix `logMCPMessage` and add a test for this debugging util. [#2989] (https://github.com/SalesforceCommerceCloud/pwa-kit/pull/2989)
+- fix `logMCPMessage` and add a test for this debugging util. [#2989] (https://github.com/SalesforceCommerceCloud/pwa-kit/pull/2989)
+- fix `run_site_test` accessibility tool response format. [#3003] (https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3003)

packages/pwa-kit-mcp/src/tools/site-test-accessibility.js

@@ -18,5 +18,12 @@ export async function runAccessibilityTest(siteUrl) {
 
     await browser.close()
 
-    return results
+    return {
+        content: [
+            {
+                type: 'text',
+                text: JSON.stringify(results)
+            }
+        ]
+    }
 }