Our larger property has an amazing kitchen - a double galley that easily accommodates 8 cooks at once, and is perfect for big family meals. We probably have more equipment than anyone expects. We keep a kitchen inventory list, and email it if a guest is planning a special meal or menu so they know what equipment we don't have.
On our tiny house, we've worked to ensure that it is as equipped as it can be--pans, knives, measuring, strainers, etc, but have less "equipment" just because there are less cupboards (food processors, stick blenders, rice cookers, crock pots fit in the large home only). However we have received compliments even on that--apparently some hosts aren't really set up for cooking. Our guests are always pleased that we stock many staples, spices and oils as well.
We've had your same experience as a guest. Our rule of thumb as a host is to pretend you are making (1) Thanksgiving dinner (2) Pizza (3) an Italian Pasta and (4) a Thai or Chinese dish, and see what you are missing that you need to cook dinner--then go buy it. If you have the space for the pans, make sure someone can make a birthday cake, pie, or cookies (even if its from a mix/box).
This is a great idea; I'd just wonder how long the equipment list should be. We've found the longer the better for guests, but some spaces can only take so much equipment.