Adds a note to the engagement initial modal to have MFA device ready …

…to avoid timeout (#3845)

src/dispatch/plugins/dispatch_slack/case/interactive.py

@@ -1519,17 +1519,39 @@ def engagement_button_approve_click(
         ).build()
         return client.views_open(trigger_id=body["trigger_id"], view=modal)
 
+    engagement = signal_service.get_signal_engagement(
+        db_session=db_session,
+        signal_engagement_id=context["subject"].engagement_id,
+    )
+
+    mfa_plugin = plugin_service.get_active_instance(
+        db_session=db_session, project_id=context["subject"].project_id, plugin_type="auth-mfa"
+    )
+    mfa_enabled = True if mfa_plugin and engagement.require_mfa else False
+
+    blocks = [
+        Section(text="Confirm that this is expected and that it is not suspicious behavior."),
+        Divider(),
+        description_input(label="Additional Context", optional=False),
+    ]
+
+    if mfa_enabled:
+        blocks.append(Section(text=" "))
+        blocks.append(
+            Context(
+                elements=[
+                    "After submission, you will be asked to confirm a Multi-Factor Authentication (MFA) prompt, please have your MFA device ready."
+                ]
+            ),
+        )
+
     modal = Modal(
         submit="Submit",
         close="Cancel",
         title="Confirmation",
         callback_id=SignalEngagementActions.approve_submit,
         private_metadata=context["subject"].json(),
-        blocks=[
-            Section(text="Confirm that this is expected and that it is not suspicious behavior."),
-            Divider(),
-            description_input(label="Additional Context", optional=False),
-        ],
+        blocks=blocks,
     ).build()
     client.views_open(trigger_id=body["trigger_id"], view=modal)