Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare write semantics (readOnlyHint=false, destructiveHint=false, idempotentHint=false, openWorldHint=true), so the safety profile is covered. The description adds nothing beyond that: it does not explain that only supplied fields change, whether omitted fields are preserved or reset, what permissions are needed, or what happens on a missing id.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.