**Error in JSON Code for creating a custom Voicemail function in VAPI ** I'm facing this error message when I'm building a custom voicemail detection and message tool in VAPI, I'm sharing the screenshot here: Here is the JSON Code: { "model": { "provider": "openai", "model": "gpt-4o", "messages": [ { "type": "system", "content": "You are calling leads about their recent inquiry. If you reach voicemail, use the leave_voicemail tool and mention their specific interest." } ], "tools": [ { "type": "voicemail", "function": { "name": "leave_voicemail", "description": "Leave a personalized voicemail message" }, "messages": [ { "type": "request-start", "content": "Hi {{customer_name}}, this is {{agent_name}} from {{company}} following up on your inquiry about {{product_interest}}. I'd love to discuss how we can help. Please call me back at {{callback_number}} or I'll try you again tomorrow. Thanks!" } ] } ] } } Please, please help me resolve this issue ASAP. I'm currently using this webpage as a resource to build this voicemail tool out: https://docs.vapi.ai/tools/voicemail-tool Please let me know if I'm making any mistake or this is a bug issue from VAPI's side. @zmguan, @Shubham Bajaj, @JerryMan0018, @Mistermanu#000, @goonybird. , @RMAGANTI6, @Ethan Tan , @ANNATIS Dev https://cdn.discordapp.com/attachments/1228667357849849856/1415224773796958238/image.png?ex=68c26e47&is=68c11cc7&hm=1eae794c050c55d475485c813d6398bda2afe880b58ead024fc94dec90d44603&