Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
With 0% schema description coverage for all 6 parameters, the description carries the full burden of explaining parameter meaning. However, it provides no information about any parameters - not explaining what 'symbol', 'interval', 'month', 'time_period', 'series_type', or 'datatype' mean, their expected formats, or how they affect the calculation. This leaves all parameters completely undocumented.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.