Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The path template gives meaning to the nested id and channelId parameters, which the schema otherwise leaves undocumented. workspaceId is described in the schema, so the description partially compensates for the 50% schema coverage, but does not explain the params in prose.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.