Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already cover safety (readOnlyHint=false, destructiveHint=false, idempotentHint=true), so the bar is lower, and the description still adds real context: anonymous submission with no identity stored, ticket lifetime of 7 days, and a 280-character cap on the reason with an explicit prohibition on personal data or secrets. It does not describe what happens on an expired or invalid ticket.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.