Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true, readOnlyHint=false, and idempotentHint=true. The description adds the write-permission requirement, which is useful, but it doesn't disclose whether deletion is permanent, whether it cascades to scheduled reports, or what happens to associated data. No contradiction with annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.