Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 0%, so the description carries the burden for parameter semantics. The description mentions 'faits confirmés' which maps to the 'facts' parameter, but it doesn't explain the 'as_of' parameter or the structure of DeliveryFacts. With 0% coverage, the description should compensate more, but the 'facts' parameter is at least referenced. Baseline 3 is appropriate given the schema is self-explanatory for the main parameter.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.