curl --request POST \
  --url http://localhost:3000/users/{userId}/tools \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "arguments": {}
}
'

{
  "content": [
    {
      "type": "<string>",
      "text": "<string>"
    }
  ],
  "isError": true,
  "error": "<string>"
}