ammo box! it is that latch that is very important on them, and then how the lid overall closes. any other tool boxes. will most likely vibrate apart and crack. or in my case, leave a trail of tools across the entire property and hidden in grass. because box came open.
goto google and type in...
tool box site:tractorbynet.com
the "site:tractorbynet.com" without quotes. search just this website.
click up on images. and you should get a lot of images back.
==============
some folks have mounted 4" pipe on the FEL (front end loader) bucket, with test plugs, to screw on end caps. to generic end cap. that was grinded down on inside of cap. and then a pin dropped through cap and pipe to hold it.
most rear tire fenders on tractors (plastic) need extra mount to mount something to a fender.
1.5" up to 6" pipe. with a end cap on bottom. can work nice to toss long handle tools into (shovels) some folks have used them to toss chain into as well.
my personal favorite is 5 gallon buckets. find a spot to toss handle over a hook. and use it to carry some tools back and forth between shed and tractor, then tractor and job site.
saftey issues with messing with roll bar. folks have used the roll bar on tractor a lot. mounting Hooks, on each side of roll bar. facing the back. to toss shovels on. or putting a bar across it, and coming off the bar with some hooks for chains. ((doh doh doh)) getting nailed in head by chains. fishing pole holder setup with some straps on both sides of roll bar.
pending on your "step" to tractor. you might be able to remove the step and install a tool box. (larger tractors yes, smaller most likely not)
if you have a FEL (front end loader), you might be able to come off the supports that are near the steering wheel. and swing a tool box out one bracket (think side view mirror on a vehicle but tool box). or put a pipe holder vs tool box and zip tie it to the FEL supports.
if no FEL. you might see if there are "side weights" or "mounting holes" on the frame work around the engine sides.