The tundra would have been
The tundra would have been called a 3/4 ton in the past....the motor, transmission etc are all very strong both in reliability and in pulling ability and the brakes and suspension are up to the job.
You are well within your legal limits and you will find that the truck handles your trailer very well - plenty of power and stopping ability and the chassis is up to the job. Mine has 200k on it and towed for probably 1/3 of its miles and little to no maintenance issues. (changed the water pump and radiator as they were seeping and a wheel bearing got noisy)