diff --git a/tools/update-tags-encoding b/tools/update-tags-encoding
index 9ab10a0..03b866e 100755
--- a/tools/update-tags-encoding
+++ b/tools/update-tags-encoding
@@ -1,8 +1,13 @@
 #!/bin/bash
 #
-# Check out the `entomologist-data` branch in a temporary worktree.
-# For each issue with a `tags` file, replace the old-style tags file with a new-style tags dir.
-# git commit
+# Check out the specified branch (or `entomologist-data` if not specified)
+# in a temporary worktree.
+#
+# For each issue with a `tags` file:
+#
+#     replace the old-style tags file with a new-style tags dir
+#
+#     git commit
 
 set -e
 #set -x