Trigger a rule when an activity is created

We monitor certain types of Activities and run certain actions/metrics based on the type of activities and to which object it is linked to.

It would be really nice to create a trigger for e.g.

If a timeline entry is added/associated to a CTA / Success Plan with parameters xxxxx, yyyy, then do xxxxxxxxxxx

This will improve Manager tracking of critical events, reduce dependency on running a rule chain frequently to achieve this.