TransferCallTool

{
    "type": "transfer_call",
    "destinations": [
        {
            "type": "number",
            "number": "+31612345678",
            "description": "Sales department",
            "message": "I'm transferring you to sales, one moment please."
        },
        {
            "type": "number",
            "number": "+31687654321",
            "description": "Support department",
            "message": "I'm transferring you to support."
        }
    ]
}