Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The readOnlyHint annotation already declares this a safe read operation, so the description doesn't need to restate that. It adds context about the scope (all hot and warm leads) and the MEDDIC evidence filter, but does not disclose behaviors like pagination, ordering, or data freshness. With annotations covering the safety profile, the added context is sufficient but not rich.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.