Overview
The {jrCore_item_list_buttons} template function brings the create/update/delete..... and any other buttons that are available to the current user out to the template.
Its a catch all function created to allow modules to add buttons to other modules locations without the need to adjust their templates.
In short it says:
"Show any buttons that should show here.".
If you need finer grained control over which buttons show you can swap this function out for in the templates and add in whichever individual buttons you need.