In a similar not to Google Calendar, I was trying to send an SMS using Vapi’s default tools. But it wasn’t saving properly via dashboard. Then I tried to do it via API and seems like the JSON property for that sms default tool is not longer supported. In short, I ended up using Make to send an sms during a Vapi call. You can do the same with Google Calendar. I would actually recommend that approach bc you’re not at the mercy of Vapi’s GC integration. At least Make’s integration is tried and tested