Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the behavioral transparency burden. It does disclose that the operation is a non-mutating list and that data comes from a 'local queue.' However, it does not describe return shape, ordering, pagination implications of the limit parameter, or what 'pending' means in this queue context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.