Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full burden. It explains case-insensitive keyword search, lists arguments, and details the return structure. However, it does not specify whether search is fuzzy or exact, or if it supports multiple keywords, leaving minor gaps.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.