Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It adds that the feed is 'real-time' and 'unified' and lists contents, but offers no insight into ordering, caching, rate limits, error behavior, or how 'edge' is computed. This is minimal additional context beyond the tool's name and title.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.