Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false, destructiveHint=false, idempotentHint=false and openWorldHint=true, so the safety profile is covered. The description adds nothing beyond that: it does not explain what a partial update changes, which fields are mutable, whether omitted fields are preserved, or any permission requirements. It does not contradict the annotations, but it contributes no behavioral context of its own.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.