Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Beyond the destructiveHint annotation, the description adds valuable behavioral nuance: existing posts keep their stored label, only the pickable template is removed, and an audit envelope is written. This is exactly the kind of side-effect disclosure that helps an agent predict consequences.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.