Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations provided, so description carries full burden. It successfully discloses what data is retrieved (balance, positions, orders) in lieu of an output schema. However, it omits details on data freshness, caching behavior, or whether this requires authentication.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.