Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, destructiveHint=false, and idempotentHint=true, covering safety expectations. The description adds the article-level sentiment detail and the 'mirrors /analysis' context, which provides some behavioral insight beyond annotations but does not disclose return format, pagination, or rate limits.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.