magento-test/app/code/Magento/MediaGalleryUiApi/etc/acl.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Acl/etc/acl.xsd">
    <acl>
        <resources>
            <resource id="Magento_Backend::admin">
                <resource id="Magento_Backend::content">
                    <resource id="Magento_Backend::content_elements">
                        <resource id="Magento_Cms::media_gallery" title="Media Gallery" translate="title">
                            <resource id="Magento_MediaGalleryUiApi::insert_assets" title="Insert assets into the content" translate="title" sortOrder="40"/>
                            <resource id="Magento_MediaGalleryUiApi::upload_assets" title="Upload assets" translate="title" sortOrder="50"/>
                            <resource id="Magento_MediaGalleryUiApi::edit_assets" title="Edit asset details" translate="title" sortOrder="60"/>
                            <resource id="Magento_MediaGalleryUiApi::delete_assets" title="Delete assets" translate="title" sortOrder="70"/>
                            <resource id="Magento_MediaGalleryUiApi::create_folder" title="Create folder" translate="title" sortOrder="80"/>
                            <resource id="Magento_MediaGalleryUiApi::delete_folder" title="Delete folder" translate="title" sortOrder="90"/>
                        </resource>
                    </resource>
                </resource>
            </resource>
        </resources>
    </acl>
</config>