Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100% — each of the three parameters (id, captureId, fileName) has a description in the schema. Per the baseline for high coverage, the description need not repeat param details, and it doesn't. The description adds no extra meaning about which ID maps to which part of the flow, but the schema already carries the documentation burden adequately.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.