hand_to_chest and hand_on_chest. Neither have wikis, and as a result there is little in the way of differentiating the two. This was brought to my attention when I tagged an image as hand_on_chest but someone else added the hand_to_chest tag later. If the two are synonymous, then we only need one tag, but if the two should be different, then we need to define what constitutes what.
Updated by rantuyetmai