RFID is an over-engineered solution to a simple problem!
Basically all we need to do is a check that all the tools taken on an aircraft are taken off.
To simplify that task an effort should be made to reduce the number of tools taken on board. Do you really need a whole kit just to replace an instrument etc.
My company has recently re-issued tool kits in Peli-cases complete with CNC foam cut outs. The tools were supplied by a well known German tool manufacturer.
Personal tool kits are no longer permitted, just a selection of carefully thought out kits that can be booked in/out of stores.
This way you don't have to re-issue tools to everyone, this makes sense as not all of the tools are being used all of the time.
Tool kits breakdown
A&C Grab and Go (1/4 drv socket set, small combi spn, wire twisters etc)
AVO Grab and Go ( similar to above but with few extra specialist items)
These items in Peli briefcase
AOG Kit (A&C Grab and Go contents plus 3/8, 1/2 socket sets, large combi spn, hacksaw, hammers etc.)
All in Peli 5 draw roller box
Base kits have also been provided in steel roller cabs, for hangar use only.
Initially people were distrusting of the whole idea. However as time goes on we are starting to accept the idea. It does get rid of all those "Tool Kit Egos" amongst us.
I think the key to the success of the whole scheme, is the careful selection of the tool kit contents.