this!! also take video of your tools.Your company will have an insurance policy to cover the tools. Speak with HR and ask them how much they cover and if you need to provide a list with serial numbers. I have field techs and the company will cover theft provided the tools were properly. All of my techs have to provide a list twice a year andpictures if there are no serial number. As long as the tool boxes are secured we cover theft.
If the boxes were not locked the insurance says tough luck.