Gittin 26: "Because of the Decree"

A new mishnah! And a template for a divorce, as well as other transactions, and the question of what blanks would need to filled with the right names and the date and so on. But templates don't really work for gittin. Plus, how the get is actually written. Also, what does it mean that the sages decreed... They wanted to prevent quarreling. They wanted to prevent conflicts over the same name. Or putting the divorcing couple on the spot. Plus, "agunah" (in contrast to modern examples). How iron-tight can the decree go?