Jamba Macros are click macros.

/click JMB_xxx where xxx is your macro name.

In the macro interface there is a field that you can copy the exact command from!

However, you still need to execute the macro on all toons and that is where keybinds help a lot.

I should be able to add /jamba-team camp and /jamba-team leavebg easily, but /jamba-team hearth would be harder (internal macro inside Jamba).

For hearthing, why not drop the hearthstone into Jamba-Item-Use's Item Bar and use that? (ISBoxer repeater regions over the item bar or keybinds on the item bar are needed for the item bar to function correctly.)