Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, informing the agent of safe, non-destructive behavior. The description adds that the tool returns a URL (implying a read operation), which is consistent. However, it does not disclose edge cases like no matching URL, ambiguity handling, or response format. It minimally supplements the annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.