Will say what i say to a lot of people in trades. locally a few of us have gps trackers, you can get batteries that have gps trackers in them. will certainly improve the likelihood of recovery, if you can say to police i know where my tools are and in 5 minutes will be entering the a property to retrieve them, and would you like to come maintain the peace as you might be required to use 'proportionate' force they will be there immediately!! Have seen police issue a crime reference number to mates when they call it in without investigating, only to quickly come out when they realise people might take action themselves. in this instance the 2 nomadic caravan dwellers ended up with broken nose and somehow some caravans mysteriously caught fire in the following weeks, I am not advocating arson but you can see why people do take law into own hands. Before this the Plod turned up arrested 2 of them for possession of stolen goods. released on bail, eventually no further action was taken. - lack of evidence as they claimed to have found tools in a field.
Even smaller tracking devices located within the tools will work, I have seen an mft with a gps tracker wired into it. so it can be done. the actual tracker module is very small I did consider wiring one into my dewalt sds, when taking it apart recently to replace some parts that had worn out i realised how much space is inside the body. could easily power a tracker so that when a battery is connected it gives location.
Need to think outside the box.