Document model access for agent apps (#63011)

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: isaacmbrown

content/copilot/concepts/agents/agent-apps.md

@@ -17,6 +17,8 @@ contentType: concepts
 
 For example, an {% data variables.copilot.agent_app %} could analyze your product analytics, scan your application for security vulnerabilities, or add feature flags to a pull request, then connect back to the partner's systems to complete the task.
 
+You can view available apps on [{% data variables.product.prodname_marketplace %}](https://github.com/marketplace?type=apps&category=agent-apps).
+
 ## Where you can use {% data variables.copilot.agent_apps %}
 
 {% data reusables.copilot.agent-apps-entrypoints %}
@@ -38,6 +40,8 @@ To use an {% data variables.copilot.agent_app %}, the {% data variables.product.
 * When you install an {% data variables.copilot.agent_app %}, {% data variables.product.github %} highlights that the app includes agent features and asks you if you want to enable them. For more information, see [AUTOTITLE](/apps/using-github-apps/about-using-github-apps).
 * If the app is installed in an organization owned by an enterprise, an administrator must also enable the "{% data variables.copilot.agent_apps %}" {% data variables.product.prodname_copilot_short %} policy before the agent features become available. For more information, see the "Next steps" section.
 
+{% data reusables.copilot.model-access-agent-apps %} See [AUTOTITLE](/copilot/how-tos/administer-copilot/manage-for-enterprise/manage-availability-of-default-models).
+
 ## Billing
 
 {% data reusables.copilot.agent-apps-billing %}

content/copilot/how-tos/administer-copilot/manage-for-enterprise/manage-availability-of-default-models.md

@@ -29,10 +29,12 @@ This sets a baseline that you can add to with more granular controls. For models
 {% data reusables.enterprise-accounts.configure-allowed-models %}
 1. Select a status for each model in the list:
 
-   * **Enabled** for everyone.
-   * **Disabled** for everyone.
+   * **Enabled** for every user and {% data variables.copilot.agent_app %}.
+   * **Disabled** for every user and {% data variables.copilot.agent_app %}.
    * **Delegate** the decision to organizations or enterprise teams and apps.
 
+{% data reusables.copilot.model-access-agent-apps %}
+
 ### Checking for unconfigured models
 
 {% data reusables.copilot.model-autoenablement %}
@@ -96,6 +98,17 @@ To grant access to an enterprise team:
 1. Click the **Default models** tab.
 1. For each model that the team should receive access to beyond the enterprise baseline, set the dropdown to **Enabled**.
 
+### Granting access to {% data variables.copilot.agent_apps %}
+
+{% data reusables.copilot.agent-apps-intro %} See [AUTOTITLE](/copilot/concepts/agents/agent-apps).
+
+Ensure models you want to enable specifically for apps are set to **Delegate to Enterprise Teams/Apps** in your enterprise's model policies.
+
+{% data reusables.enterprise-accounts.ai-controls-tab %}
+{% data reusables.enterprise-accounts.copilot-sidebar %}
+1. Under **Models**, click **Configure app models**.
+1. For each available model you want to enable, change the dropdown from **Optional** to **Enabled**.
+
 ## Further reading
 
 * [AUTOTITLE](/copilot/reference/supported-surfaces-for-policies)

content/copilot/how-tos/use-copilot-agents/cloud-agent/use-agent-apps.md

@@ -18,6 +18,11 @@ category:
 
 Before you can use an {% data variables.copilot.agent_app %}, the {% data variables.product.prodname_github_app %} must be installed on the account or organization that owns the repository, and agent features must be enabled for the app. If the repository is owned by an organization that belongs to an enterprise, the "{% data variables.copilot.agent_apps_caps %}" {% data variables.product.prodname_copilot_short %} policy must also be enabled in your enterprise settings.
 
+## Installing an agent app
+
+1. View available apps on [{% data variables.product.prodname_marketplace %}](https://github.com/marketplace?type=apps&category=agent-apps).
+1. On the app page, click **Add**, then install the app on your personal account or organization.
+
 ## Authorizing an agent app
 
 The first time you use an {% data variables.copilot.agent_app %}, {% data variables.product.github %} prompts you to authorize the app through an OAuth flow. Follow the prompts to authorize the app before the agent runs. For more information, see [AUTOTITLE](/apps/using-github-apps/authorizing-github-apps).

data/reusables/copilot/model-access-agent-apps.md

@@ -0,0 +1 @@
+By default, {% data variables.copilot.agent_apps %} have access to the models that are enabled in the organization or personal account where the app is installed. However, in the enterprise teams mode for model access, available models for {% data variables.copilot.agent_apps_short %} are controlled at the enterprise level.