Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnly, idempotent, and non-destructive, so the safety profile is covered. The description adds genuine behavioral context beyond that: only a 'ready' status means the private draft, atomic replacement, or assetId result was actually saved, while errors and pending are not success. This result-interpretation guidance is valuable and not derivable from the annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.