> ## Documentation Index
> Fetch the complete documentation index at: https://docs.lytix.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Guardrails Setup

> How to setup Guardrails with Lytix

<Info>
  **Prerequisites:** Setup optimodel [here](/Quickstart/optimodel-getting-started)
</Info>

Now you're ready to start adding guardrails to your calls. Here is the general syntax:

<CodeGroup>
  ```py Python
  from optimodel import queryModel

  response = await queryModel(
      ....
      messages=[
          ModelMessage(
              role="system",
              content="You are a helpful assistant. Always respond in JSON syntax",
          ),
          ModelMessage(role="user", content=prompt),
      ],
      guards=[...] # Optional guards param
  )
  ```
</CodeGroup>

# Blocking Requests

In addition to the guard itself, you can also use the blockRequest flag to block requests when a guard is active and give a custom message to return instead.

<CodeGroup>
  ```py Python
  guards=[MicrosoftPresidioConfig(
      guardName="MICROSOFT_PRESIDIO_GUARD",
      guardType="preQuery",
      entitiesToCheck=["EMAIL_ADDRESS"],
      blockRequest=True, # Pass this to block the request
      blockRequestMessage="You are not allowed to ask about this email address" # Pass this to give a custom message
  )]
  ```
</CodeGroup>

# Available Guardrails

### meta-llama/Prompt-Guard-86M

Utilize Meta's prompt guard to protect against jailbreaks and injection attacks. See the model card [here](https://huggingface.co/meta-llama/Prompt-Guard-86M) for more information.

*Note: We recommend starting with only jailbreak with a value of 0.999 unless you know what you are doing*

<CodeGroup>
  ```py Python
  guards=[LLamaPromptGuardConfig(
      guardName="LLamaPromptGuard",
      jailbreakThreshold=0.9999,
      guardType="preQuery", # You'll likely only want to guard the input here
  )]
  ```
</CodeGroup>

### microsoft/Presidio-Guard

Utilize Microsoft's Presidio Guard to protect against PII. See the model card [here](https://microsoft.github.io/presidio/) for more information.

<CodeGroup>
  ```py Python
  guards=[MicrosoftPresidioConfig(
      guardName="MICROSOFT_PRESIDIO_GUARD",
      guardType="preQuery",
      entitiesToCheck=["EMAIL_ADDRESS"], # See the model card for the full list of entities to check
  )]
  ```
</CodeGroup>

### lytix/Regex-Guard

Simple regex guard to protect against given regex patterns. See [here](https://github.com/Lytix-Labs/optimodel/blob/master/guardServer/src/optimodel_guard/Guards/RegexGuard.py#L54) for source code on how its implemented.

<CodeGroup>
  ```py Python
  guards=[LytixRegexConfig(
      guardName="LYTIX_REGEX_GUARD",
      regex="secrets",
      guardType="preQuery",
  )]
  ```
</CodeGroup>