I am entitled to a citizens arrest of the suspect, with all the liability that implies for myself if I am wrong.
If the subject refuses to comply, then enough physical violence to restrain them until police arrive or at least my property is returned is absolutely warranted. No more violence than this though, and it's a very subjective line. If I end up being wrong about it being my property, I am in some serious shit if I decide to go down this route.
This whole meme that you can do whatever you want to my property and you can't do anything about it is just silly. It's not reality for most of humanity, and is a very small bubble in western history so far.
I'm doing fine in life now so my bar for this is far higher. However at much more desperate times in my life, stealing the tools out of my truck would have been existential and I would have fought anyone I caught stealing them to the death if required. It's a huge amount of privilege to say property doesn't matter and can easily be replaced.
I also have in the past showed up at thieves homes to retrieve my stolen property - luckily no violence was ever needed, and I had no plans to engage in it going into those situations. The vast majority of the time if you confront such a thief they will instantly give up because they are simply not used to any pushback whatsoever from victims (or anyone at all whatsoever these days).
Was this likely a stupid personal decision for my own safety? Yep. But it was the only decision you can make if you actually care about society. We are seeing the results of too many people making the rational personal choice at the expense of the greater good today.