Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden. It discloses the paid crypto requirement ('crypto 付费模式下需先付 USDT 并带 tx_hash'), which is a critical behavioral trait. It also implies a multi-step process (pay first, then provide tx_hash). However, it doesn't mention what happens if tx_hash is missing or invalid.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.