---
title: Activate an input guardrail for your instance
slug: agent-platform/docs/activate-an-input-guardrail-for-your-instance
docTags: 
createdAt: 2026-08-26T22:45:42.000Z
---

Activate an input guardrail to enforce one content policy for your Optimizely Agent Platform instance. The instance-level input guardrail applies to the requests Mark handles directly. To screen a specialized agent, [assign a per-agent guardrail instead](docId:5gldqAfbXf_LZHPLZXwOC).

## Prerequisites

The guardrail must already exist and have a trained model with the status **Ready**. To create and train one, see [Create and train an input guardrail](docId:-seHtlUToZb5C0L8Bmkvu).

## Activate the guardrail

To activate a guardrail for your instance, complete the following steps:

1. Go to **Settings > Chat > Active Input Guardrail**.

::Image[]{src="https://api.archbee.com/api/optimize/BrbvVORKJ5iIeSMZye5kI/SaciFM2NdWgoVKXO1Th9D_activate-in-settings.png" size="100" isUploading="false" position="center" width="2286" height="914" darkWidth="2286" darkHeight="914" showCaption="false" indent="1"}

2. Select the trained guardrail from the **Active Input Guardrail** drop-down list.

::Image[]{src="https://api.archbee.com/api/optimize/BrbvVORKJ5iIeSMZye5kI/wmIdmeD_sF5GzoJyohvnP_select-guardrail.png" size="100" isUploading="false" position="center" width="1556" height="992" darkWidth="1556" darkHeight="992" showCaption="false" indent="1"}

3. Select the version from the **Version** drop-down list. Only versions with the status **Ready** display in this list.

::Image[]{src="https://api.archbee.com/api/optimize/BrbvVORKJ5iIeSMZye5kI/rmTnC0DGGiCtl19rjXjpE_select-guardrail-version.png" size="100" isUploading="false" position="center" width="1566" height="940" darkWidth="1566" darkHeight="940" showCaption="false" indent="1"}

The guardrail takes effect immediately for all requests across your Agent Platform instance.

Only one guardrail is active per instance at a time. Activating a new guardrail replaces the previously active one. To deactivate all guardrails, clear the selection in the **Active Input Guardrail** drop-down list.

:::hint{type="info"}
**Note**

If you use Opti ID, administrators can turn off generative AI in the Opti ID Admin Center. See [Turn generative AI off across Optimizely applications](docId\:X5U0kKD2azV5cIdNqwGNj).
:::