Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It indicates a read-only polling operation and that it returns recent signals/changes/alerts, but it does not mention event ordering, pagination behavior, or any limitations. The word 'feed' and 'poll' strongly imply a safe read, but more detail (e.g., whether it's long-polling, how duplicates are handled) would improve transparency.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.