another tool for (one's)/the toolbox

An additional skill, strategy, tactic, etc., that one can use in some endeavor or pursuit. Look, recovery from this sort of trauma requires a lot of different approaches. Therapy is just another tool for the toolbox. I'm really happy you're taking that course on cloud platform development. It's going to be another useful tool in your toolbox as your career in software development progresses. This medication is just another tool for the toolbox, to be taken on those days when your headaches are intolerably painful.