Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The annotations include readOnlyHint=true, so the description does not need to repeat that it is a safe read operation. The description adds the filter capability, which is a behavioral aspect but not a disclosure of side effects or constraints. It does not mention pagination behavior, rate limits, or any other operational details, but given the annotation coverage, 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.