Hmm - that doesn't allow the agent to optionally use the call from within the agent step depending on results of other skills though. See where I put the "make phone call" skill in my screenshot? Is that skill just unusable?
I figured out how to pay for an outbound phone number, but there doesn't seem to be a way for me to use that phone number for my agent's skill - see https://share.zight.com/Z4uEQpJR - there is no way to set the outbound phone number here...and when the task executes it says that it cannot make an outbound call, even though I'm on the Pro plan