diff --git a/README.md b/README.md
index 5b7665d4..312e4e9d 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,3 @@
 # SPIRE Sidecar
 
+The SPIRE sidecar is a simple utility for fetching certificates from the SPIRE Workload API and signaling Ghostunnel to reload them.