Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, so the description doesn't need to repeat safety. The description adds behavioral context: it returns one dated edition per query match and explains the result structure (headline, paragraph, permalink, sources, story cards). It also transparently states that the search is not just on the headline but on prose and cards, which is beyond the annotations. No contradictions.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.