Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Adds real context beyond the annotations: data freshness ('checked daily', 'which your training data cannot know'), result cardinality (up to five), the verdict vocabulary (connect, connect with care, skip, not proven yet), and a concrete quota ('Free; twenty a day per address or account'). Annotations cover the read-only safety profile, and nothing here contradicts them. The remaining gap is that the 'checked daily' freshness claim is not tied to any recency parameter or staleness rule.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.