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 states the tool returns a JSON description of columns, which is helpful, but lacks details on error handling (e.g., what happens if the table doesn't exist), performance characteristics, or authentication requirements. This is a significant gap for a tool that interacts with a database.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.