Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already flag a destructive, idempotent, open-world write, and the description adds substantive context beyond them: it advances the description into the Lightbringer workflow, sends email notifications to specialist and submitter with the primary contact copied when applicable, and returns whether preparation was newly requested or already existed (consistent with idempotentHint). It also discloses a real limitation — email delivery status is not included — and defines what the call does NOT do, so there is no contradiction with destructiveHint.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.