Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Goes well beyond the destructiveHint/idempotentHint annotations: it defines the idempotent contract precisely (deleted=false, no error), states the deletion is undoable with a stated caveat about replacement saves, and explains the downstream effect that reports revert to canonical values on regeneration.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.