I allow my guests to use my kitchen and they have all been respectful and cleaned up after themselves, but I know all hosts have not had this experience. Some guests end up cooking for themselves and some never do. Personally I prefer to offer use of the kitchen, because I don't want them having food in the bedroom (I live in the tropics and it attracts ants and so on) And it has led to some nice shared meal experiences, but I realize all hosts may not want that type of interaction with their guests. One guy came home with a kilo of shrimp, we peeled them together , I donated the butter and garlic, he cooked them and we had a feast!
Some guests may have dietary ssues and need to cook for themselves rather than eat out, but in that case, the onus should be on them to ask you about kitchen use in their inquiry or booking request. If you don't want them to use the kitchen that much, they might do well to look further for a booking where they can.
You need to do whatever you feel comfortable with and just make it clear in your description as well as in your messaging with guests.
I don't offer use of my washing machine, mainly because I don't have a huge, consistent supply of water, but if I am doing a load, I'll ask my guest if they have any small items they'd like to throw in. They always appreciate that and usually come up with a couple pairs of socks, some underwear, etc.