Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Without annotations, the description must disclose behavior itself. It states that only reviews containing image/video/media evidence are returned, which is useful, but it does not clarify pagination behavior, return format, whether it fetches from Amazon directly, or whether it is a pure read operation. This is a meaningful but not severe gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.