Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description must carry the full burden. It mentions return type (JSON string) and error handling (Chinese error messages), but does not disclose if this is read-only, any authentication needs, rate limits, or side effects. Given that it's a listing operation, it is likely safe, but the description does not make this explicit.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.