Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true, idempotentHint=false and openWorldHint=true, so safety profile is largely covered by structured data; the description's added value is the admin-permission requirement. It says nothing about whether answers or submitted responses are also removed, or whether the deletion can be undone.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.