Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false, idempotentHint=true and destructiveHint=false, so the safety/mutation profile is covered. The description adds the PUT verb and 'same body as create plus agent_id', which usefully signals full-replacement semantics (consistent with 7 required fields), but it does not state what happens to the live agent, auth requirements, or side effects.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.