Separation Agreements

My husband and I have agreed to very simple terms for our separation - he wants nothing from the marriage with the exception of some items he purchased, and I have also agreed to give him a portion of the proceeds from our home if and when I choose to sell it, and neither of us wants any interest in any retirement accounts. savings accounts, or investments the other has. In writing up the separation agreement, can we simply say “husband agrees to waive all claim to all assets and property of the marriage with the exception of the following items:” , and " wife agrees to give x% of the net proceeds from the marital home if and when the home is sold" ? Or do we need to list out all of our accounts, debts, property, etc.? We are really trying to keep it as simple and painless as possible.