Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden. It does not say whether this displaces an existing goal, whether it can be cancelled, whether Baritone must be running, or what state it changes — 'head towards' implies ongoing motion with no disclosure of side effects.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.