[the_gentlegiant]

....Always make it clear that canned cycles have been turned off by using the G80 cancel command once you have finished running your canned cycles, another reason it should always be in the Program Header (Safety Line) also.

Already standard practice here.

Every tool I've ever called starts out like this: (Obviously changes to start location/H/T/S and sometimes G54 needed)

T2M6 (A TOOL OF SOME KIND)
G17G20G40G49G54G80G90G98

G0X0.5Y-0.5
G43Z0.1H2S7500M3T3
M8