Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must fully disclose behavioral traits. It only states the tool returns a score and breakdown, but omits details such as whether it modifies state, requires authentication, has rate limits, or provides real-time vs cached data.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.