Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is clear. The description adds no behavioral context beyond the annotations, such as pagination behavior, ordering, or whether the result is hierarchical. With annotations covering the core safety traits, a 3 is appropriate because the description adds no extra behavioral value.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.