chore: tighten scheduling review coverage

docs/wf_cli.md

@@ -117,7 +117,8 @@ wf-rpc-server --store-root .wf_store --enable-scheduler
 ```
 
 or set `server.scheduler.enabled` (plus optional `poll_interval_s`,
-`max_concurrent_runs`, `drain_grace_s`) in the neutral config. See
+`max_concurrent_runs`, `drain_grace_s`) in a local/static neutral config.
+MCP-backed servers reject this setting. See
 [`deployment scheduling operations`](deployment_scheduling.md).
 
 `admin registry` shows desired persisted source entries. It is separate from