Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and idempotentHint=true, so the safety profile is covered. The description adds no behavioral context beyond the purpose, such as error behavior, return format, or cache semantics. It doesn't contradict the annotations but also contributes nothing beyond them.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.