Parameter Variables in Custom Action or Command

I want to create some commands that require passing some complex parameters. I want to know which variables can be used in the Parameter of Actions or Commands.
I couldn’t find relevant content in the help documentation or discussions.
Thank you for your help.

What do you expect here ?
I use this 2 variables

“{action_path}”
“{action_path:parent}”

What else can Listary provide, all other parameters are defined from the program you invoke.