Create an Explicit Block policy

---
title: Create an Explicit Block policy
description: Stop a user, a department, or everyone in your organization from using a specific AI agent, model, or domain.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/intelligent-experiences/gov-pol-create-explicit-block-policy.html
release: brazil
topic_type: task
last_updated: "2026-09-10"
reading_time_minutes: 2
keywords: [ServiceNow Otto, AI Agents, generative AI, agentic AI, Policies, Explicit Block, Control Framework, block]
breadcrumb: [Managing policies, Controlling AI asset usage, Govern AI assets, AI Control Tower, Establishing AI governance, Enable AI Experiences]
---

# Create an Explicit Block policy

Stop a user, a department, or everyone in your organization from using a specific AI agent, model, or domain.

## Before you begin

To enforce a block on an external system, confirm the corresponding connector is already configured. External systems include cloud AI agents and devices running Agent Client Collector \(ACC\). See [Configuring security connections](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/intelligent-experiences/aict-configuring-security-connections.md).

Role required: sn\_ai\_governance.ai\_steward

## About this task

An Explicit Block policy stops a user, a department, or everyone in your organization from using a specific AI agent, model, or domain. Once published, it stays in effect until you delete it; there's no pause or in-between state.

## Procedure

1.  Navigate to **All** > **AI Control Tower** > **Home** > **Govern** > **Policies**.

2.  Select **Create policy**.

3.  Enter a name and description of this policy.

4.  In the Policy type section, select **An explicit block**.

5.  In the Block section, define who's blocked.

    Select **User** to block specific people, or **Department** to block everyone in a department. Leave the search field empty to apply the block to everyone.

6.  In the Block section, define what they're blocked from using.

<table><thead><tr><th align="left" id="d362119e169">

Option

</th><th align="left" id="d362119e172">

Description

</th></tr></thead><tbody><tr><td id="d362119e178">

**AI agent**

</td><td>

1.  In the What field, select **AI agent**.
2.  Identify the AI agent that you want to block by building a condition using a field, an operator, and a value. For example, **Asset** \| **is** \| **ACME Agent**.
3.  Combine multiple conditions with **and** or **or**, or select **Add group** for another set of conditions.


</td></tr><tr><td id="d362119e220">

**Model**

</td><td>

1.  In the What field, select **Model**.
2.  Enter one or more models in a comma-separated list.


</td></tr><tr><td id="d362119e241">

**Domain**

</td><td>

1.  In the What field, select **Domain**.
2.  Enter one or more domains in a comma-separated list.


</td></tr></tbody>
</table>7.  In the Block section, add a follow-up action.

    A follow-up fires only when the policy actually blocks an attempt, not just because it's published.

    1.  Select **+Add follow-up**.

    2.  Select **Notify**.

    3.  Search or enter the user to notify.

8.  Review the policy, then select **Publish**.


## Result

The policy takes effect at every enforcement point it applies to. If enforcement depends on an agent installed on a device, such as ACC, the block takes effect when the policy syncs to that device.

## What to do next

Confirm the policy is working as expected by reviewing the policy enforcement activity. For details, see [Reviewing policy enforcement activities in AI Control Tower](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/intelligent-experiences/gov-pol-reviewing-enforcement-activity.md).

To change who or what a published policy blocks, edit it. For details, see [Edit an Explicit Block policy](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/intelligent-experiences/gov-pol-edit-explicit-block-policy.md). Alternatively, clone the policy to try a variant without changing the original, then delete the original once your clone is confirmed working, if you no longer need it. For details, see [Clone a policy](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/intelligent-experiences/gov-pol-clone-policy.md).