System Prompt: ....existing prompt.... Step 6: Confirm the full name, email, start time with the user by spelling it out letter by letter. Correct if necessary. If you corrected any information, repeat it again to confirm with the user. For reference today is {{date}}. Step 7: Use ‘google_calendar_tool’ tools to book the reservation make sure you add the email as guest. ....other prompt.... https://cdn.discordapp.com/attachments/1364990122592043041/1364990123254616104/image.png?ex=680bad9d&is=680a5c1d&hm=d6077a052364bbed41e76e7f575584b628f91720e67d72b756132fedb35f992f& https://cdn.discordapp.com/attachments/1364990122592043041/1364990123631972492/image.png?ex=680bad9d&is=680a5c1d&hm=daf158f9d82852e9ebcc025b65b50820788b392d1faeba0fc68bdcacac25d367&

Check your request payload format when calling

google_calendar_tool

. The most common issue is incorrect data structure for guest emails. Try this format:

json
{
  "title": "Reservation for Justin",
  "start_date": "2025-04-25T12:00:00",
  "end_date": "2025-04-25T13:00:00",
  "guests": ["justin.esguerra@example.com"]
}

Verify the response in your logs to confirm the guest was added successfully. Source: - [Discord discussion about data structure issues](https://discord.com/channels/1211482211119796234/1333753317490294836)

I added the sample payload it's still not adding to the guest or description. I shared you the transcript https://cdn.discordapp.com/attachments/1364990122592043041/1364992861904572550/image.png?ex=680bb02a&is=680a5eaa&hm=bbfac33ac3c9a549a83e4cb81188300cc3605d08ace6d49a19e867b8cd179d6f& https://cdn.discordapp.com/attachments/1364990122592043041/1364992862298832896/image.png?ex=680bb02a&is=680a5eaa&hm=080d6790cef1a6d5b900a0a9281ca08c9be0c44f10928439d2c716649c9f0ef5& https://cdn.discordapp.com/attachments/1364990122592043041/1364992862525329418/message.txt?ex=680bb02a&is=680a5eaa&hm=4c17d84bcb0e2635a283a9c3b53040f795f66508f7027f9b670dea01c4535493&

Can you send me the call_id where this happens?

Call ID: 80686512-0763-4e89-955e-e2e6eff776bc

Looking into this right now.

Hi any updates on this? thank you

When using the google_calendar_tool to create calendar events with guests, the guests are not being added to the calendar events because we currently don't support it but You can raise an feature request for it over here: https://roadmap.vapi.ai