type ask to target as Ident (#2621)

hive-agent-mcp/src/mcp/mod.rs

@@ -181,13 +181,17 @@ impl AgentServer {
     async fn ask(&self, Parameters(args): Parameters<AskArgs>) -> String {
         let log = format!("{args:?}");
         run_tool_envelope("ask", log, async move {
+            let to = match args.to.map(|t| hive_types::Ident::parse(&t)).transpose() {
+                Ok(to) => to,
+                Err(reason) => return format!("invalid `to` agent name: {reason}"),
+            };
             let (resp, retries) = self
                 .dispatch(hive_core_agent_sock::Request::Ask {
                     question: args.question,
                     options: args.options,
                     multi: args.multi,
                     ttl_seconds: args.ttl_seconds,
-                    to: args.to,
+                    to,
                 })
                 .await;
             let s = match resp {