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 simply says 'stops the simulation' without detailing side effects (e.g., does it reset the scene, clear object states, or just halt execution?). No mention of prerequisites, reversibility, or impact on related tools. This is minimal disclosure for a state-changing operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.