By default, Gemini Enterprise blocks the creation of Custom Managed Connector Platform (MCP) data stores using a managed organization policy constraint. To enable the creation of Custom MCP data stores, an Organization Policy Administrator must override this restriction.
Before you begin
Ensure you have the Organization Policy Administrator role (
roles/orgpolicy.policyAdmin).
Override the constraint
To create a Custom MCP server data store in your Google Cloud project, you must override the existing managed organization policy constraint. Follow these steps:
In the Google Cloud console, go to the Organization Policies page.
In the project selector, select the project for which you want to change enforcement.
In the Filter field, enter
Disable custom MCP server connector for Gemini Enterprise.Click the policy name to navigate to the policy details page.
Click Manage Policy.

Select the option to Override parent's policy.
Add a new rule and set the enforcement toggle to OFF.
Click Set Policy.
Verify the policy change
After you apply the new configuration, verify that the policy status is updated to Not enforced.
The following image shows the Organization Policy Service details page with the policy set to Not enforced:

What's next
- Create a custom MCP server data store. For more information, see Set up a custom MCP server.