Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the schema already documents each parameter. The description adds meaning by explaining the step object format with concrete examples and the sequential counting condition, which is not present in the schema. It does not add much to period/from/to/site, but the schema handles those adequately.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.