Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already mark destructiveHint=true and idempotentHint=true, so the deletion behavior is known. The description adds minimal extra behavioral context beyond that, such as 'previously stored' and 'clear sensitive data.' It does not disclose, for example, whether deletion is permanent or impacts related records, but the annotation coverage lowers the bar.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.