Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, so the agent knows it is a safe read operation. The description adds no further behavioral context (e.g., what happens to the report state, whether any side effects exist). With annotations covering safety, the description is adequate but not enriching.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.