In ServiceNow, the Caller Access field is used to define the level of access that external scripts or applications have to a particular script include or application resource. The valid options for the Caller Access field are:
* None: No special restrictions are applied; the resource is accessible as defined by other security settings.
* Caller Restriction: Limits access to the resource, allowing only specified callers or applications to invoke it.
* Caller Tracking: Enables tracking of which callers are accessing the resource, providing an audit trail for monitoring purposes.
Options such as "Accessible from," "Allow Configuration," and "Caller Permission" are not valid selections for the Caller Access field.
For more detailed information, refer to the official ServiceNow documentation on Restricted Caller Access Privileges.