Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the agent knows this is a safe read operation. The description adds only a source URL and return type, which does not disclose any additional behavioral traits (e.g., data freshness, pagination, rate limits). No contradiction with annotations, but minimal added context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.