Ensure it provides a workerId

Author: jahands

apps/workers-builds/src/tools/workers-builds.tools.ts

@@ -41,7 +41,8 @@ export function registerBuildsTools(agent: BuildsMCP) {
 		'workers_builds_list_builds',
 		fmt.trim(`
 			Use the Workers Builds API to list builds for a Cloudflare Worker.
-			If no workerId is provided, the active worker (set by workers_builds_set_active_worker) will be used.
+
+			MUST provide a workerId or call workers_builds_set_active_worker first.
 		`),
 		{
 			workerId: z.string().optional().describe('The Worker ID to list builds for.'),