Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint and a closed world, so the safety profile is covered. The description adds that question details come back in the payload, which is useful context, but says nothing about behavior when the ID is invalid or missing. With annotations carrying the main burden, a 3 is appropriate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.