ok seems like I was using a very old starter example

g0t4 · g0t4 · commit bb90a7719f3b · 2025-04-17T02:21:47.000-05:00
diff --git a/src/index.ts b/src/index.ts
@@ -151,7 +151,6 @@ server.setRequestHandler(ListToolsRequestSchema, async () => {
     };
 });
 
-// TODO verify this is the proper new "not legacy" format (w/o embedded toolResult)
 server.setRequestHandler(
     CallToolRequestSchema,
     async (request): Promise<CallToolResult> => {
