diff --git a/bundle/internal/schema/annotations.go b/bundle/internal/schema/annotations.go
index 05afbe54b..7b3f61bf6 100644
--- a/bundle/internal/schema/annotations.go
+++ b/bundle/internal/schema/annotations.go
@@ -31,6 +31,12 @@ type annotationHandler struct {
 	empty annotationFile
 }
 
+/**
+ * Parsed file with annotations, expected format:
+ * github.com/databricks/cli/bundle/config.Bundle:
+ *  	cluster_id:
+ *      description: "Description"
+ */
 type annotationFile map[string]map[string]annotation
 
 const Placeholder = "PLACEHOLDER"