How to filter Groovy scripts only to trigger from UI/user actions for Activity object

Summary:

Tigger Activity Object's groovy scripts only via UI actions

Content (required):

Hi,

We have a requirement to run specific validations for Activity object when the record create or Update by a user from UI. At the moment, theses scripts are triggered when back end tasks happens, as an example, when CDM merges records.

For Service request Object we found below and it works as we want.

def source=SourceCd

if(source=="ORA_SVC_AGENT_UI")

What I want to know is what would be the condition for 'Activity' object.

Version (include the version you are using, if applicable):

Oracle Cloud Application