curl --request PATCH \
  --url https://{api_endpoint}/api/v1/agents/external-chat/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "title": "<string>",
  "description": "<string>",
  "tags": [
    "<string>"
  ],
  "name": "<string>",
  "api_url": "<string>",
  "auth_scheme": "BEARER_TOKEN",
  "auth_config": {},
  "chat_params": {},
  "instructions": "<string>",
  "nickname": "<string>",
  "connection_id": "<string>",
  "config": {
    "hidden": false,
    "enable_cot": false
  },
  "context_access_enabled": true,
  "context_variables": [
    "<string>"
  ]
}
'

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>"
    }
  ]
}