Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral disclosure burden. It does disclose that the tool returns a cached score and is intended for previously checked entities, but it does not explain what happens on a cache miss, whether a live lookup can occur, or any error behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.