Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of disclosing behavior. It adds valuable context like the cost ($0.005 USDC per call) and the specific enrichment steps. Yet it does not state read-only nature, side effects, or failure conditions, so transparency is adequate but not thorough.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.