Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must carry the behavioral load, and it does disclose one meaningful trait: that finished/collected jobs are excluded from the result. It says nothing about ordering, whether job IDs are returned for reuse, or that it is a non-blocking read, which leaves the read semantics only partly covered.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.