A tool in anyone's hands. A hammer is a tool. Period. In a carpenters hands it is a constructive tool. In a murderer's hands it is a weapon. In my 5 year old's hands, it is a tool of destruction. In my hands it is a tool for smashing thumbs. Use does not change nature.
Incidentally, mammon, or mammonas in the Greek, is not money. It is treasure, or riches personified. Once you live your life for wealth, in other words, you have made an idol out of riches, thus personifying it in a sense. It is a more complicated term than just money.
I am aware of the more expansive meaning of mammon, although I cannot read greek. Was referencing more a tool in the hands of the devil and thus a snare for those who devote their lives to seeking it.