Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations provide openWorldHint=false and destructiveHint=false, which already signal safety and bounded effects. The description adds the context that the tool produces a dossier for a reviewing attorney, but it does not disclose side effects, persistence, idempotency, or downstream workflow impact.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.