#To save you asking more of these questions...

The sublime maneuvers from Tome of Battle do not care, at all, at any point, about what weapon you are using. They may care about the kind of attack you make, and some weapons may not be able to make that kind of attack, but the only thing the maneuvers care about is that the attack gets made. The weapon you use is irrelevant.

So it does not matter if you have proficiency, it does not matter if it’s a real weapon or improvised, it does not matter if you could also use that weapon to make another kind of attack: all that matters is that you make the kind of attack stated in the maneuver. There are no hidden gotchas.¹ Tome of Battle simply does not care what weapon you use to initiate a maneuver.

That also means that the weapons associated with a given discipline are irrelevant to using maneuvers from that discipline. The only things that care what sort of weapon you use are a few of the feats, mostly the ones like Shadow Blade that are tied to a particular discipline and only work with the weapons associated with that discipline.

1. _{Well, one, sort of: Stone Dragon maneuvers all must be initiated while standing on the ground. That has nothing to do with weapons, of course, but it is a surprising detail hidden away where you wouldn’t expect it, so “gotcha” applies. Of course, your game is better off ignoring that rule anyway, so if you missed it that’s fine.}

To save you asking more of these questions...

The sublime maneuvers from Tome of Battle do not care, at all, at any point, about what weapon you are using. They may care about the kind of attack you make, and some weapons may not be able to make that kind of attack, but the only thing the maneuvers care about is that the attack gets made. The weapon you use is irrelevant.

So it does not matter if you have proficiency, it does not matter if it’s a real weapon or improvised, it does not matter if you could also use that weapon to make another kind of attack: all that matters is that you make the kind of attack stated in the maneuver. There are no hidden gotchas.¹ Tome of Battle simply does not care what weapon you use to initiate a maneuver.

That also means that the weapons associated with a given discipline are irrelevant to using maneuvers from that discipline. The only things that care what sort of weapon you use are a few of the feats, mostly the ones like Shadow Blade that are tied to a particular discipline and only work with the weapons associated with that discipline.

1. _{Well, one, sort of: Stone Dragon maneuvers all must be initiated while standing on the ground. That has nothing to do with weapons, of course, but it is a surprising detail hidden away where you wouldn’t expect it, so “gotcha” applies. Of course, your game is better off ignoring that rule anyway, so if you missed it that’s fine.}