Fix unintended credential exposure to MCP Servers (#17311)

Co-authored-by: Tommaso Sciortino <sciortino@gmail.com>

packages/core/src/services/environmentSanitization.test.ts

@@ -46,6 +46,9 @@ describe('sanitizeEnvironment', () => {
       CLIENT_ID: 'sensitive-id',
       DB_URI: 'sensitive-uri',
       DATABASE_URL: 'sensitive-url',
+      GEMINI_API_KEY: 'sensitive-gemini-key',
+      GOOGLE_API_KEY: 'sensitive-google-key',
+      GOOGLE_APPLICATION_CREDENTIALS: '/path/to/creds.json',
       SAFE_VAR: 'is-safe',
     };
     const sanitized = sanitizeEnvironment(env, EMPTY_OPTIONS);

packages/core/src/services/environmentSanitization.ts

@@ -103,6 +103,9 @@ export const NEVER_ALLOWED_ENVIRONMENT_VARIABLES: ReadonlySet<string> = new Set(
     'GOOGLE_CLOUD_PROJECT',
     'GOOGLE_CLOUD_ACCOUNT',
     'FIREBASE_PROJECT_ID',
+    'GEMINI_API_KEY',
+    'GOOGLE_API_KEY',
+    'GOOGLE_APPLICATION_CREDENTIALS',
   ],
 );