diff --git a/CHANGES.rst b/CHANGES.rst
index d5021c9..6e69fab 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,3 +1,5 @@
+.. _checkmk_agent__ref_changelog:
+
 Changelog
 =========
 
@@ -30,6 +32,8 @@ Added
 - Automatically enable the ``smart`` Check_MK agent plugin on physical hosts to
   query Self-Monitoring, Analysis and Reporting data from disks. [ypid_]
 
+- Add :ref:`checkmk_agent__ref_ansible_facts` documentation. [ypid_]
+
 Changed
 ~~~~~~~
 
diff --git a/docs/facts.rst b/docs/facts.rst
new file mode 100644
index 0000000..2d03fb0
--- /dev/null
+++ b/docs/facts.rst
@@ -0,0 +1,31 @@
+.. _checkmk_agent__ref_ansible_facts:
+
+Ansible facts
+=============
+
+.. include:: includes/all.rst
+
+The role exposes part of it’s state by means of Ansible local facts for other
+roles and playbooks to use.
+The interface is considered public and changes to it happen in compliance with
+`Semantic Versioning`_ of the role and will be mentioned in the :ref:`checkmk_agent__ref_changelog`.
+Here you can find documentation and examples for them.
+
+Specification
+-------------
+
+``checkmk_agent.plugins``
+  List of all Check_MK Agent plugin names which are enabled (and configured if
+  necessary) by the role. Refer to :envvar:`checkmk_agent__plugins` and related
+  variables for details.
+
+  Availability: Always, after ``debops-contrib.checkmk_agent/env`` has been run.
+
+Example
+-------
+
+.. code-block:: json
+
+   {
+       "plugins": ["nginx_status"]
+   }
diff --git a/docs/index.rst b/docs/index.rst
index 50093a3..5570671 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -10,6 +10,7 @@ Ansible role: debops-contrib.checkmk_agent
    getting-started
    defaults
    defaults-detailed
+   facts
    copyright
    changelog