Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare the tool as read-only, non-destructive, and idempotent. The description confirms it is a retrieval operation, adding little beyond the annotations. No additional behavioral traits (e.g., error handling, response format) are disclosed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.