Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
With 12 parameters at 50% schema coverage, the schema does only half the work. The description reinforces fix_revision's binding semantics and constrains the evidence field ('no secrets'), but says nothing about note, outcome values, environment, or the other undocumented params; baseline 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.