If they do it would be a good thing. Right now I think most people are waiting for the program cars are made to start working on custom ones from what I've seen so far. I do hope that they'll release tools but idk about that.
That desc. was changed a while ago, but it seems it must have accidentally been added back at some point.
Will get it updated, as it's kind of pointless to tease players about something that doesn't happen yet.