Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden of behavioral disclosure. It states the tool retrieves data ('Get all stocks'), implying a read-only operation, but does not specify whether it requires authentication, has rate limits, returns paginated results, or handles errors. The mention of 'on a date' hints at historical data access, but behavioral details are minimal.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.