Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden. It discloses that the tool returns scene settings and all objects in alias format in real time, which is useful. However, it does not mention error handling, side effects (though a getter is likely safe), or the exact response format, leaving some behavioral aspects undisclosed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.