Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is reported at 100% for the single top-level body parameter, so the baseline of 3 applies even though the description contributes nothing. The caveat is that the nested body fields (projectId, actionName, workflowId, executionId, parameters, constraint) carry almost no per-field descriptions, so which identifier is actually required for a run is genuinely ambiguous and the description does not resolve it.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.