Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true, readOnlyHint=false, and idempotentHint=false, so the safety profile is covered. The description adds real value beyond that: the precondition that open claims block the release, and what actually moves (remaining stake to the principal) rather than relying on the vague name 'release'.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.