Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full responsibility for disclosing behavior. It only mentions billing cost and labels the tool as 'Explore', omitting what the tool returns, any side effects, limitations, or required permissions. This is insufficient for an agent to understand the tool's operational traits.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.