Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description bears full responsibility for behavioral disclosure. It only states 'reset to initial state' without explaining what state is affected (e.g., win/loss tracking, bet sequence), whether the action is irreversible, or if any ongoing session must exist. This is insufficient for a mutation tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.