We do get plenty of description on commands though, with some pretty thorough response tables and examples of "anchor text" -- something that the automatedassistant tries to pluck from your ramblings in order to make sense of them.
One interesting note, which may mean absolutely nothing: The artwork on the invitation closely resembles the drawings associated with its Google Now automated personal assistant on Android.
This sometimes confuses Siri, Apple's automated, voice-controlled assistant, and requires you to press an icon on the phone directing Siri to use the phone, not the Pebble.