Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With annotations marking this as a non-read-only, destructive, idempotent mutation, the description adds real non-annotated facts: recipes remain in place and the default cookbook stays personal. It does not explain the destructiveHint=true — nothing about what a rename might break (e.g., references, name collisions) or what the response contains.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.