In response to your query, I would say nothing definitive. I have been using Right-Hand Chain and Left-Hand Chain for at least 10 years. I started with Right-Hand Chain because I wanted to imply the existence of a Left-Hand Chain, an underused choreographic element IMHO. Since I define a RH chain as "whoever is on the right side, extend right hands and pull by... [etc]", it seems to me that it would also function as positional. I have experienced a 99%+ success rate with these terms and descriptions, including when I add in the rate chain along the line.

LH chains are still rare and somewhat awkward for experienced dancers in my experience. But as their appearance increases in frequency, the awkwardness dissipates.