Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the behavioral burden. It does disclose useful constraints like count max 20 and the allowed language values, and the operation is clearly a read-only news search, but it does not describe result behavior such as relevance ordering, freshness, or article metadata beyond what the output schema provides.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.