diff --git a/vars/local_vars_medium.yml b/vars/local_vars_medium.yml
index 36e36e8e3..cfa6ac0e8 100644
--- a/vars/local_vars_medium.yml
+++ b/vars/local_vars_medium.yml
@@ -184,9 +184,11 @@ ejabberd_enabled: False
 lokole_install: False
 lokole_enabled: False
 
+# MQTT pub-sub broker for IoT on Raspberry Pi etc
 mosquitto_install: False
 mosquitto_enabled: False
 
+# Flow-based visual programming for wiring together IoT hardware devices etc
 nodered_install: False
 nodered_enabled: False