Trust me

I have spent the last few hours putting together a Memorandum of Understanding covering a joint project involving 3 parties. I anticipate no problems ... the organisations share mutual trust. But as soon as you start to put these things on paper all sorts of questions emerge .... what happens if that trust goes and we get problems ... should the MoU cover that? You end up writing lots of strange clauses that will almost certainly never be needed. Not very productive ... but I suppose most insurance isn't!