Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations declare readOnlyHint=true, so the safety profile is already conveyed. The description adds that it returns 'detailed information' about a specific ACG but does not disclose response format, pagination, error behavior, or permission requirements. With annotations covering the key behavioral concern, 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.