Approximate amounts help when you know them — "2 chicken breasts, 3 cups cooked rice, 1 eggplant" — but don't worry about being exact.
Optional — helps us prioritize what's most at risk of going to waste.
Basic or fancy, list what you've got — "salt, pepper, olive oil, garlic" is just as useful as "herbes de provence infused olive oil." The more specific you can be, the better we can match suggestions to how you actually cook — but simple is completely fine too.