Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
There are no annotations, so the description must carry the burden. It states the tool opens a window, implying a UI action with no destructive side effects. However, it does not disclose if there are any blocking behaviors, return values, or requirements beyond selection. Adequate for a parameterless tool but limited.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.