Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already communicate readOnly, idempotent, and non-destructive behavior. The description adds no additional behavioral traits beyond the generic 'detail'. It does not mention response behavior, errors, or side effects, so it provides minimal added value.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.