Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The description adds substantial value beyond the input schema, which has 0% description coverage. It provides clear semantics for all 10 parameters, explaining what each represents (e.g., 'Contact name', 'True if it's a company'), noting optionality, and specifying defaults (e.g., 'default: True' for customer). This fully compensates for the schema's lack of descriptions.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.