Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
There are no annotations, so the description bears the full burden. It discloses the checks performed (online status, ComfyUI engine, auth) and recommends calling before generation, which implies a safe read-only operation. However, it does not explicitly state that the call has no side effects or describe what the response contains or failure looks like.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.