diff --git a/README.md b/README.md
index ebbe5e1..47eaca1 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ Operator tooling for the Chum Bucket Relay link.
 ## Layout
 
     deploy/relay.sh      bring the tunnel up on a fresh jump host
-    bin/healthcheck.sh   probe the relay and exit non-zero if it is down
+    bin/healthcheck.sh   probe the relay (needs RELAY_TOKEN) and exit non-zero if down
     bin/rotate-token.sh  ask the relay to mint a new operator token
     .env.example         copy to .env and fill in, never commit the result