Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must carry the full behavioral burden. It states the action but does not disclose side effects, error handling for non-running simulators, or whether the operation is reversible. The minimal wording leaves behavioral traits underexplained.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.