Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full behavioral burden. It discloses only that output is random/non-deterministic; it says nothing about output length or structure, whether calls are rate-limited, or whether results can repeat, which is exactly the kind of context a generator tool should supply.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.