Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema has 100% coverage with detailed descriptions for every parameter, including the alternative relationship between page_id and page_url. The tool description adds little beyond restating those facts, though it does clarify 'optionality' of children listing. Since the schema is rich, the description earns the baseline score but no more.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.