Wood, drywall, roofing, siding, flooring, cabinets, furniture, and ordinary household junk are all fine. The limits here come from the County landfill gate rather than from a statewide list of banned material.
Hazardous waste stays out of every container. That means paint, solvents, fuel, motor oil, pool chemicals, pesticides, and asbestos, along with liquids of any kind and sealed drums.
The County sets its own refusals at the scale. Off-road tires are not accepted at all, and a tire mixed into a load of other waste carries a charge of its own. Every customer at the landfill has to show an Anne Arundel County driver's license and vehicle registration, which is one reason a container with a hauler behind it is simpler than a self-haul run.
Maryland also enforces load securing on the way there. State law requires a vehicle to be built or loaded so nothing can drop, sift, leak, or escape, with the load and its covering fastened down, and it puts the duty to clean up anything that falls on the owner. That is why the drivers tarp, and it is a good reason not to overfill above the rails. If an item has you guessing, ask your account manager before it goes in.