The Parameters info is the information you are after

this command is a counter command, it does absolutely nothing for the actor using it, if you want it to attack set type to 0. You type it in just as you see it 'counter' is the flag telling the script that this command is a counter attack command and the 100 tells use the chance which in this cause.

Animation IDs
To change the animation used add this to the parameters hash
'animation_id' => [anim1_id, anim2_id]

so for out counter example to change it set it to

parameters {'counter' => 100, 'animation_id' => [1, 30]}

if the value isn't set then the default is used, see the script for that

Help Text
To change the Help Text shown add this to the parameters hash
'help_text' => HELP TEXT DISPLAYED

and that will change the text used when the commands effect is executed

Abilities vs Commands

If you set a command as hidden using the hidden parameter then the command becomes an ability and its effects will activate regardless if it was used or not

if a command is not hidden then it must be used for the effect to activate