Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden but offers minimal behavioral insight. It implies a read operation but doesn't disclose error handling (e.g., if some paths are invalid), performance characteristics (e.g., rate limits for batch reads), or output format (e.g., whether content is returned as raw text or structured data). The description adds little beyond the obvious 'read' action.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.