We recognized, that the default Parameters that come with the NetXMS Agent have a certain Data Type and Description which makes it easy to create to DCIs.
When using Values from a ExternalParametersProvider you always have to check both but they are always the same.
maybe you could add this information to the return value
before:
ParameterName=Value
after:
ParameterName:DataType:Description=Value

what do you think?

regards