Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It states the wait condition but does not disclose what happens on timeout (error? return?), whether it polls or uses an event, whether it returns any value, or whether it blocks indefinitely. The timeout parameter is in the schema but the description doesn't explain its behavior (e.g., default 15 seconds, what happens when exceeded).
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.