There are lots of different tool boxes to pick from. I got one that has most of its pockets on the inside,
to help reduce the risk of drops. I've attached a rope that lets me clip it to the tower while keeping it
level.
The pockets includes a pliers, diagonal cutters, box cutter, screwdriver, crescent wrench, and heavy scissors.
In the box there is a loose hardware tube, mastic, electrical tape, wire ties, plus a pouch for wrenches and
for small-to-medium deep-well sockets.
Initially I used a black microphone pouch for the wrenches but it proved fragile and too small, so was replaced
with a much nicer high-vis milwaukee pouch.
I have attached a small close-able link to any tools that don't already have a reliable way to tether them,
except for the screwdriver.
There's a little bit of room inside to carry other things like U-bolts, hose clamps, etc, as the job requires.
Most of the tools are generic Menards "Masterforce" brand, although I did opt for a vice-grip diagonal cutter
and a Knipex electrical shears.