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. While it states what the tool does, it doesn't mention important behavioral aspects like authentication requirements, error handling, rate limits, or what happens with invalid inputs. For a decryption tool with security implications, this is a significant gap in transparency.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.