Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so the baseline is 3; the description adds extra meaning by tying the version parameter to the two output modes (draft step graph vs deployed steps). The schema handles the enum and format details (workflow_, ws_, TEST/PRODUCTION), so the description doesn't need to repeat them.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.