Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The annotations already declare readOnlyHint, openWorldHint, and idempotentHint, which cover the safety profile. The description adds the concrete return payload (title, description, canonical URL, article text), which is behavioral detail beyond what the annotations provide. No contradiction exists, and the added return fields help the agent anticipate the output format.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.