# Features and Limitations

## Components

As you can expect, not all CSML components work well with a SMS chatbot, as there is no support for any visual component or buttons. However you can use all of the following standard components:

* Text
* Question (buttons will be added in a new line under the question's title)
* Image

Other components will be automatically reduced to simple text components.

## Metadata

Each call made to CSML Studio will have a number of metadata, based on what information is provided by Twilio. An example `_metadata` object would look like this:

```javascript
{
  "ToCountry": "FR",
  "ToState": "",
  "SmsMessageSid": "SMfaXXXX",
  "NumMedia": "0",
  "ToCity": "",
  "FromZip": "",
  "SmsSid": "SMfaXXXXX",
  "FromState": "",
  "SmsStatus": "received",
  "FromCity": "",
  "Body": "Hello",
  "FromCountry": "FR",
  "To": "+33644648719",
  "ToZip": "",
  "NumSegments": "1",
  "MessageSid": "SMfaXXXX",
  "AccountSid": "ACa6XXXX",
  "From": "+336XXXXXXX",
  "ApiVersion": "2010-04-01",
  "_channel": {
    "type": "twilio-sms",
    "name": "XXXXXXXXXXXX"
  }
}
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.csml.dev/studio/channels/twilio-sms/features-and-limitations.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.