Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=true; the description adds nothing about behavior, including why the tool is flagged open-world or what the cache/fresh flag implies about freshness of results. Credit here only for not contradicting 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.