Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The annotation readonlyHint=true already signals a safe read operation, and the description is consistent with it. The description adds that the tool returns 'concrete note fields and metadata,' but does not disclose behavior like error handling, pagination, or response structure. Since annotations cover the safety profile, a score of 3 is appropriate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.