Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
With 0% schema description coverage, the description compensates by explaining the effect of three parameters (body, format, title) via 'only the body, format, and title change.' It does not explicitly describe the 'slug' parameter, but it is implied as the page identifier ('one of your pages') and needed for 'in place' replacement. The enum for format is not elaborated, but schema provides that.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.