I haven't done this in the past because I honestly didn't think about it. But as I've done more quilts I think it's important. If you have a quilt that has been passed down in the family, if there isn't someone around to tell you about it you have to guess who made it. I have a couple of quilts from my grandmother (who passed in 1956) and I wish I knew more about them. I know one of them was made from my grandfather's suits but only because someone knew about it. It was a crazy quilt and very heavy. A lot of wool in it and cotton batting.
I would say not only label it but if there is something special about it, add that too. If it was a specific pattern or blocks, you might want to add that to. JMHO