Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
There is a single required parameter with 100% schema description coverage, including how to extract `viewId` from a page URL, so the schema already does the work. The description's coordinate discussion (x, y, w, h) describes the response shape rather than adding meaning to the input parameter, so baseline 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.