Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so the baseline is 3, but the description adds real meaning beyond the schema: it explains the coupling between the filter params and confirmDeleteAll, and why the guard exists (unrelated migrations would be destroyed). It does not add format or syntax detail beyond that.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.