Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must disclose behavioral traits. It correctly states 'Retrieve', suggesting a read-only operation, and mentions the additional data returned (opportunity count, lead count). However, it does not mention required permissions, error handling for missing IDs, data freshness, or whether the tool modifies state. Adequate for a simple retrieval but lacks depth.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.