editing tools (chainsaw, drill, flash, ...)

Hello to all, i'm working to change the tools command into sing, my problem is that i can change the animation of the tools but i can't add status to the tools or get healing when i use a tool

for example: for test i use autocrossbow to change it to life's anthem, i can get the animation but i don't heal the characters, only have damage.

is possible link the tools to a spells or adds status when it used?

anyone can help me please?