Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations provided, so the description carries the full burden. It discloses return type (JSON string) and error handling (Chinese error messages) but does not mention read-only nature, data sources, or rate limits. Lacks detail beyond basic behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.