When creating a Trigger, Autoregistration or Discovery action and selecting operations (in Operation details) user sees a possibility to choose a script only if at least one script with "Action operation" scope is defined.

This can be misleading for beginners. For example, in creating a new "Trigger action" user sees "Operation: Send message" as the only available option. (In creating Autoregistration or Discovery actions the "Operation details" window offers more options but still no hint that scripts can be used here).
Showing a hint in the menu like "Script (no scripts are configured)" would be helpful.