Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must carry the full burden of behavioral disclosure. It only mentions the high-level action (find and tap) but omits key behaviors such as partial match handling, what happens on multiple matches, whether the tool scrolls to the element, and failure behavior. The schema documents the exact parameter but the description itself adds little beyond the core action.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.