Agreed, no one should leave with less than they came with, but if they came with a 1980s right angle and broke it, I buy them a new one and they decide to leave, maybe I should get something out of it as well. Hell, they prorate tires and batteries at the parts stores.
As for tools in the work place, I think the small stuff that you need every day should be yours. How ever, I don't want to see a bag full of "Harbor Freight" junk tools.
If there is a specific tool or piece of test equipment that as a company you require, then I think it needs to be part of the hiring paperwork. "You are responsible for your hand tools, and you need the following, at a minimum..."
At any rate, I think that if the company requires a specialty tool for a specific procedure, then it is the company responsibility to provide it. If basic tools are enough to do the job and the tech wants better, he buys it. If he breaks company provided, company replaces. If he breaks his, he replaces.