diff --git a/check_home_assistant_state.py b/check_home_assistant_state.py
index 62cb26e..1c1aa8c 100755
--- a/check_home_assistant_state.py
+++ b/check_home_assistant_state.py
@@ -1,5 +1,7 @@
 #!/usr/bin/env python3
 
+"""A check plugin for Nagios/Icinga/etc. that queries Home Assistant for the current state of entities."""
+
 import argparse
 import dataclasses
 import logging