Warning: If one is only being toolish you may still have a chance to revert them back to a normal non asshole person who can be respected.
"Hey He's been a bit toolish lately"
"Damn Bob been acting toolish every since he met that hoe"
"Bob been acting weird lately kinda like a tool but ehh i guess hes only toolish"
"That guy over is being toolish"
When using the word toolish make sure to use it with authority and make sure the other person knows that there being a Slight Douche Bag on the cusp of "Ultimate Douche Bag ness"
Enjoy your new found word!