curl --request PATCH \
  --url https://{api_endpoint}/api/v1/assistants/custom/{assistant_id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "title": "<string>",
  "description": "<string>",
  "tags": [
    "<string>"
  ],
  "name": "<string>",
  "nickname": "<string>",
  "instructions": "<string>",
  "user_start_messages": [
    "<string>"
  ],
  "llm_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "context_access_enabled": true,
  "context_variables": [
    "<string>"
  ]
}
'

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