Tool change and pocket update

Hello,
The machine has 3 pockets.
The cam software will chose tools in a list of aprox 10 tools.
The cam software will decide wich tool will go in wich pocket.
What is the easiest to update the tools list in linuxcnc to reflect the cam software choices ?
For example, the cam software decide to use tool 7 in pocket 3. The cam software can use variables to tell the tool 7 will be in pocket 3. How to update the tool list in linuxcnc to match the gcode variables ?

many thanks for your help !
Thierry 

G-code only uses tool numbers.
The g-code asks for a tool number, LinuxCNC looks in it's internal tool table and picks the pocket that that tool is in. \\

It's not really worth worrying about the pocket numbers in the CAM.

But it's useful to keep the CAM and LinuxCNC's opinions of what the diameter and type of each tool is synchronised.