PRS volume/tone pot?

[helmi]

On the PRS pots, they each have a capacitor. I imagine the one on the volume is some kind of treble bleed, but what is the purpose of the one on the TONE pot?

 

[Black Plaid]

The one on the tone pot is what actually makes it a tone pot.

It uses it to shunt treble (send it to ground) instead of bleed it into the signal. It acts as what we would call a 'low pass filter'