diff --git a/README.md b/README.md
index 47418d4..fa78ce4 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,13 @@ collection, and when the Hy Programming Language came out, I decided it
 was time for a minor exercise.  Rewriting mp\_suggest in Hy was a
 perfect opportunity.
 
+<kbd>mp\_suggest</kbd> does *not* alter your MP3 files; instead, it
+prints to stdout a simple Bash script that invokes the command-line
+program id3v2; you can capture that script and run it by hand, or pipe
+the output of <kbd>mp\_suggest</kbd> through <kbd>sed</kbd> to make
+changes on the fly, or just run the output straight into Bash with a
+unix pipe.
+
 Writing mp_suggest was an interesting exercise in returning to Lisp
 after all these years.  I find that I really enjoyed it (although,
 honestly, Hy's debugging facilities leave a lot to be desired).  The