diff --git a/action.yml b/action.yml
index 19555a1..739a1c0 100644
--- a/action.yml
+++ b/action.yml
@@ -21,13 +21,13 @@ inputs:
     description: Subject of mail message
     required: true
   body:
-    description: Body of mail message (might be a filename to read from)
+    description: Body of mail message (might be a filename prefixed with file:// to read from)
     required: true
   to:
     description: Recipients mail addresses (separated with comma)
     required: true
   from:
-    description: Full name of mail sender
+    description: Full name of mail sender (might be with an email address specified in <>)
     required: true
   content_type:
     description: Content-Type HTTP header (text/html or text/plain)