diff --git a/modelindex/generate_readmes.py b/modelindex/generate_readmes.py
index 88847d1c..0cdefd0d 100644
--- a/modelindex/generate_readmes.py
+++ b/modelindex/generate_readmes.py
@@ -1,3 +1,7 @@
+"""
+Run this script to generate the model-index files in `models` from the templates in `.templates/models`.
+"""
+
 import argparse
 from pathlib import Path