Depends on the trade but tape measure and pencil+sharpie is standard. Framers will need hammer and speed square, electrician will need strippers, lineman pliers, etc.

Most stuff will be provided by whoever youre working with but you’ll be expected to invest in your tools periodically. If you have to borrow something twice, you should pick it up.

Also, good protective shoes. Im a big fan of my Keens.