Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden of behavioral disclosure. It implies read-only but does not explicitly state non-destructiveness, error handling, or what happens if no session exists. The limited information (three fields) does not sufficiently reveal behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.