Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must carry the full burden of behavioral disclosure. It states the feed is 'public' and headlines are 'fresh', hinting at no auth and recency, but does not disclose potential behavior like error handling for invalid sections, pagination, rate limits, or the exact structure of returned data. This is minimal disclosure for a read tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.