Short of explicitly labeling each part (which would not be in spirit of 'lightweight markup'), it's hard to imagine any link/description markup that is completely foolproof. The advantage over markdown here is that you are really only likely to get one part of the links wrong: the order. In markdown, you might also get them out of order but you may get the brackets wrong too. Then, having realized something is wrong, fixing it way more complicated. With Org-Mode, you notice your link isn't working right so you swap the order and you're done.