Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden but only states the basic operation without behavioral details. It doesn't disclose if this is a read-only operation, what cryptographic algorithm is used, error conditions (e.g., invalid key format), performance implications, or security considerations like handling sensitive private key input.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.