Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It only states 'Get trade fee' and reveals nothing about required parameters (despite symbol and recvWindow), return structure, authentication needs, or rate limits. This is insufficient for a tool that likely interacts with account-specific data.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.