curl -X PATCH https://api.thinnest.ai/agents/agent_abc123 \
  -H "Authorization: Bearer $THINNESTAI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "voice_tools": {
      "visual_ivr": {
        "enabled": true,
        "menus": [
          {
            "id": "main_menu",
            "title": "How can we help?",
            "items": [
              { "label": "Track my order", "value": "track_order" },
              { "label": "Return an item", "value": "return" },
              { "label": "Billing question", "value": "billing" },
              { "label": "Other", "value": "other" }
            ]
          }
        ],
        "branding": {
          "logo_url": "https://your-site.com/logo.png",
          "primary_color": "#4F46E5"
        }
      }
    }
  }'

When the caller needs to make a selection from multiple options (more than 3),
send them a Visual IVR menu instead of reading all options aloud. Tell the
caller: "I'm sending a menu to your phone — please tap your selection."

Wait for their response before continuing.