We have now added ParameterInstance::getDescription, which gives you the name and range of the parameter. We have also added EventDescription::getParameter, EventDescription::getParameterCount and EventDescription::getParameterByIndex; these functions allow you to query the parameters of an event without having to instantiate it first.
Unfortunately these changes didn’t make it into the 1.1 release, so they will be available in the 1.2 release.