Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already establish readOnly, idempotent, and non-destructive behavior. The description adds useful detail about returning the exact definition body as a JSON string plus checksum, but does not cover error or auth behavior; the annotation burden is reduced.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.