Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the behavioral transparency burden. It discloses the return format as a JSON array with entry/exit prices and PnL, and 'Get' implies a read operation, but it does not mention empty results, authorization needs, or whether pending orders are included.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.