diff --git a/radicale/hook/__init__.py b/radicale/hook/__init__.py
index 04378a2e..009f1b52 100644
--- a/radicale/hook/__init__.py
+++ b/radicale/hook/__init__.py
@@ -55,16 +55,17 @@ def _cleanup(path):
 
 class HookNotificationItem:
 
-    def __init__(self, notification_item_type, path, uid=None, new_content=None, old_content=None):
+    def __init__(self, notification_item_type, path, content=None, uid=None, new_content=None, old_content=None):
         self.type = notification_item_type.value
         self.point = _cleanup(path)
+        self._content_legacy = content
         self.uid = uid
         self.new_content = new_content
         self.old_content = old_content
 
     @property
     def content(self):  # For backward compatibility
-        return self.uid or self.new_content or self.old_content
+        return self._content_legacy or self.uid or self.new_content or self.old_content
 
     @property
     def replaces_existing_item(self) -> bool:
@@ -73,8 +74,7 @@ class HookNotificationItem:
 
     def to_json(self):
         return json.dumps(
-            self,
-            default=lambda o: o.__dict__,
+            {**self.__dict__, "content": self.content},
             sort_keys=True,
             indent=4
         )
diff --git a/radicale/hook/email/__init__.py b/radicale/hook/email/__init__.py
index 8f69dbdb..034882ee 100644
--- a/radicale/hook/email/__init__.py
+++ b/radicale/hook/email/__init__.py
@@ -2,6 +2,8 @@
 # for email notifications
 # Copyright © 2025-2025 Nate Harris
 import enum
+import hashlib
+import json
 import re
 import smtplib
 import ssl
@@ -74,7 +76,9 @@ This is an automated message. Please do not reply.""",
         },
         "updated_event_template": {
             "value": """Hello $attendee_name,
+            
 The following event has been updated.
+
     $event_title
     $event_start_time - $event_end_time
     $event_location
@@ -189,6 +193,42 @@ def determine_added_removed_and_unaltered_attendees(original_event: 'Event',
     return added_attendees, removed_attendees, unaltered_attendees
 
 
+def event_details_other_than_attendees_changed(original_event: 'Event',
+                                               new_event: 'Event') -> bool:
+    """
+    Check if any details other than attendees and IDs have changed between two events.
+    """
+    def hash_dict(d: Dict[str, Any]) -> str:
+        """
+        Create a hash of the dictionary to compare contents.
+        This will ignore None values and empty strings.
+        """
+        return hashlib.sha1(json.dumps(d).encode("utf8")).hexdigest()
+
+    original_event_details = {
+        "summary": original_event.summary,
+        "description": original_event.description,
+        "location": original_event.location,
+        "datetime_start": original_event.datetime_start.time_string() if original_event.datetime_start else None,
+        "datetime_end": original_event.datetime_end.time_string() if original_event.datetime_end else None,
+        "duration": original_event.duration,
+        "status": original_event.status,
+        "organizer": original_event.organizer
+    }
+    new_event_details = {
+        "summary": new_event.summary,
+        "description": new_event.description,
+        "location": new_event.location,
+        "datetime_start": new_event.datetime_start.time_string() if new_event.datetime_start else None,
+        "datetime_end": new_event.datetime_end.time_string() if new_event.datetime_end else None,
+        "duration": new_event.duration,
+        "status": new_event.status,
+        "organizer": new_event.organizer
+    }
+
+    return hash_dict(original_event_details) != hash_dict(new_event_details)
+
+
 class ContentLine:
     _key: str
     value: Any
@@ -439,6 +479,11 @@ class Event(VComponent):
         """Return the summary of the event."""
         return self._get_content_lines("SUMMARY")[0].value
 
+    @property
+    def description(self) -> Optional[str]:
+        """Return the description of the event."""
+        return self._get_content_lines("DESCRIPTION")[0].value
+
     @property
     def location(self) -> Optional[str]:
         """Return the location of the event."""
@@ -668,7 +713,8 @@ class EmailConfig:
         """
         ics_attachment = ICSEmailAttachment(file_content=event.ics_content, file_name=f"{event.file_name}")
 
-        return self._prepare_and_send_email(template=self.new_or_added_to_event_template, attendees=attendees, event=event,
+        return self._prepare_and_send_email(template=self.new_or_added_to_event_template, attendees=attendees,
+                                            event=event,
                                             ics_attachment=ics_attachment)
 
     def send_updated_email(self, attendees: List[Attendee], event: EmailEvent) -> bool:
@@ -690,7 +736,8 @@ class EmailConfig:
         :param event: The event being deleted (or the event the attendee is being removed from).
         :return: True if the email was sent successfully, False otherwise.
         """
-        return self._prepare_and_send_email(template=self.deleted_or_removed_from_event_template, attendees=attendees, event=event,
+        return self._prepare_and_send_email(template=self.deleted_or_removed_from_event_template, attendees=attendees,
+                                            event=event,
                                             ics_attachment=None)
 
     def _prepare_and_send_email(self, template: MessageTemplate, attendees: List[Attendee],
@@ -910,7 +957,8 @@ class Hook(BaseHook):
                     event=email_event
                 )
                 if not email_success:
-                    logger.error("Failed to send some or all added email notifications for event: %s", email_event.event.uid)
+                    logger.error("Failed to send some or all added email notifications for event: %s",
+                                 email_event.event.uid)
                 return
 
             # Dealing with an update to an existing event, compare new and previous content.
@@ -924,7 +972,8 @@ class Hook(BaseHook):
                     event=email_event
                 )
                 if not email_success:
-                    logger.error("Failed to send some or all added email notifications for event: %s", email_event.event.uid)
+                    logger.error("Failed to send some or all added email notifications for event: %s",
+                                 email_event.event.uid)
                 return
 
             # Determine added, removed, and unaltered attendees
@@ -938,7 +987,8 @@ class Hook(BaseHook):
                     event=email_event
                 )
                 if not email_success:
-                    logger.error("Failed to send some or all added email notifications for event: %s", email_event.event.uid)
+                    logger.error("Failed to send some or all added email notifications for event: %s",
+                                 email_event.event.uid)
 
             # Notify removed attendees as "event deleted"
             if removed_attendees:
@@ -947,18 +997,22 @@ class Hook(BaseHook):
                     event=email_event
                 )
                 if not email_success:
-                    logger.error("Failed to send some or all removed email notifications for event: %s", email_event.event.uid)
+                    logger.error("Failed to send some or all removed email notifications for event: %s",
+                                 email_event.event.uid)
 
-            # Notify unaltered attendees as "event updated"
-            if unaltered_attendees:
-                # TODO: Determine WHAT was updated in the event and send a more specific message if needed
-                # TODO: Don't send an email to unaltered attendees if only change was adding/removing other attendees
+            # Notify unaltered attendees as "event updated" if details other than attendees have changed
+            if unaltered_attendees and event_details_other_than_attendees_changed(original_event=previous_event,
+                                                                                  new_event=new_event):
                 email_success: bool = self.email_config.send_updated_email(  # type: ignore
                     attendees=unaltered_attendees,
                     event=email_event
                 )
                 if not email_success:
-                    logger.error("Failed to send some or all updated email notifications for event: %s", email_event.event.uid)
+                    logger.error("Failed to send some or all updated email notifications for event: %s",
+                                 email_event.event.uid)
+
+            # Skip sending notifications to existing attendees if the only changes made to the event
+            # were the addition/removal of other attendees.
 
             return
 
@@ -979,7 +1033,8 @@ class Hook(BaseHook):
                 event=email_event
             )
             if not email_success:
-                logger.error("Failed to send some or all deleted email notifications for event: %s", email_event.event.uid)
+                logger.error("Failed to send some or all deleted email notifications for event: %s",
+                             email_event.event.uid)
 
             return