Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The annotations already indicate readOnly, idempotent, and non-destructive behavior, lowering the bar. The description adds 'No auth required' regarding authentication, which is not in the annotations. However, it does not mention the return format or any side effects, though the output schema may cover return structure.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.