Ordinary house and job-site debris is fine. The limits come from Indiana law and from what the receiving site will take.
Indiana keeps electronics out of anything headed for a landfill or an incinerator. The state's list is long: televisions, monitors, desktops, laptops, tablets, e-readers, fax machines, printers, keyboards, DVD players, cameras, cable boxes, and more. That's why the city won't take a television at the curb either. Pull all of it out before the container shows up.
Hazardous material stays out too: paint, solvents, fuel, motor oil, antifreeze, pesticides, pool chemicals, propane tanks, and anything containing asbestos. Liquids of any sort are a problem, because a leaking container can be refused when it reaches the scale.
Tires, car batteries, and automotive fluids need their own route. The county recycling district takes those at its office, and so does it with lead and mercury items and leftover medicines.
Not sure about one odd item? Ask your account manager before it goes in rather than after.