diff --git a/SKILL.md b/SKILL.md
index 3a8008b..d69e49a 100644
--- a/SKILL.md
+++ b/SKILL.md
@@ -46,6 +46,11 @@ are required. On subsequent logins, only `password` is needed — previously sav
 \* Required only on first login; skipped on subsequent logins (loaded from saved
 config).
 
+**Usage guidance:** If the user asks to log in and only provides a password
+(without `serverUrl`, `email`, or `username`), this is likely a *repeated*
+login — the previously saved config will be reused automatically. Just call the
+`login` tool with the password alone.
+
 #### `check_session`
 
 Check if the current session is authenticated. No parameters. Returns