Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Without annotations, the description carries full burden. It implies a read operation but does not disclose authentication requirements (though api_key and api_secret are in the schema), rate limits, or the nature of the response (e.g., list format, sorting). This is insufficient for an agent to understand the tool's behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.