Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered without the description. The description adds the return-content roster (status, name, version, API URL), but that duplicates the output schema and omits behavioral details such as whether it contacts the remote server or fails fast.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.