diff --git a/check-pol b/check-pol
new file mode 100755
index 0000000..7282ced
--- /dev/null
+++ b/check-pol
@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+set -o pipefail
+
+if [ $# -eq 0 ]
+  then
+    echo "Usage: $0 COMMIT YOUR-MNT"
+    exit
+fi
+
+BASE="$(readlink -f "$0" 2>/dev/null || python -c 'import os,sys;print(os.path.realpath(sys.argv[1]))' "$0")"
+BASE="$(dirname "$BASE")"
+cd "$BASE" || exit 1
+
+git diff --name-only "$1" | while IFS='/' read -ra LINE; do
+if [[ "${LINE[0]}" = "data" && -n "${LINE[2]}" ]]; then
+	utils/schema-check/nx3_schema.py -v policy "${LINE[1]}" "${LINE[2]}" "$2"
+fi
+done