The first thing you need to know is what is the tow rating of your Tundra.
You need to know the GVWR then account for all of your passenger weight and the weight of all of your gear.
Know the weight of the trailer and tongue weight. You can only make an educated guess based on the dry weight listed and what you will be having in your trailer.
Then do the math.
Dealers will most likely say you can tow with anything just to make the sale. Sometimes they're right but mostly it's about the sale.
Peace
Dave