Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full responsibility for disclosing behavior. It only says 'get memory usage,' omitting details about the 'path' parameter, return format, side effects, or error behavior. This is a significant gap for a tool that should clarify what the agent can expect.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.