Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the burden of disclosing behavior. It discloses that the tool is a read operation ('Returns'), states return categories (price, chains, health, security notes), and adds the cost trait ('Free to call'). It does not mention authentication, rate limits, or failure modes, but for a zero-parameter metadata endpoint this is adequate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.