DO NOT USE BRASS WITH A POWERED ANODE!!!!
We simply don’t know what will happen, but it could cause the powered anode to throw more current than it should.
One of the possibilities of an overactive powered anode is that it will knock pieces of the glass lining off the sides of the tank.
Or it might overload the anode. Or the anode might not be able to protect itself well enough from the brass and it might rust. Again, we don’t know.