diff --git a/crates/ruma-events/src/room/member.rs b/crates/ruma-events/src/room/member.rs
index 78923ddc..fdd5d697 100644
--- a/crates/ruma-events/src/room/member.rs
+++ b/crates/ruma-events/src/room/member.rs
@@ -80,7 +80,16 @@ pub struct MemberEventContent {
     #[serde(skip_serializing_if = "Option::is_none")]
     pub blurhash: Option<String>,
 
-    /// The reason for leaving a room.
+    /// User-supplied text for why their membership has changed.
+    ///
+    /// For kicks and bans, this is typically the reason for the kick or ban. For other membership
+    /// changes, this is a way for the user to communicate their intent without having to send a
+    /// message to the room, such as in a case where Bob rejects an invite from Alice about an
+    /// upcoming concert, but can't make it that day.
+    ///
+    /// Clients are not recommended to show this reason to users when receiving an invite due to
+    /// the potential for spam and abuse. Hiding the reason behind a button or other component
+    /// is recommended.
     #[cfg(feature = "unstable-pre-spec")]
     #[cfg_attr(docsrs, doc(cfg(feature = "unstable-pre-spec")))]
     #[serde(skip_serializing_if = "Option::is_none")]