diff --git a/lib/crewai/src/crewai/a2a/extensions/a2ui/__init__.py b/lib/crewai/src/crewai/a2a/extensions/a2ui/__init__.py
index 724a3bd9b..a0e6698f6 100644
--- a/lib/crewai/src/crewai/a2a/extensions/a2ui/__init__.py
+++ b/lib/crewai/src/crewai/a2a/extensions/a2ui/__init__.py
@@ -32,7 +32,10 @@ from crewai.a2a.extensions.a2ui.models import (
     UserAction,
 )
 from crewai.a2a.extensions.a2ui.server_extension import A2UIServerExtension
-from crewai.a2a.extensions.a2ui.validator import validate_a2ui_message
+from crewai.a2a.extensions.a2ui.validator import (
+    validate_a2ui_event,
+    validate_a2ui_message,
+)
 
 
 __all__ = [
@@ -64,5 +67,6 @@ __all__ = [
     "TextField",
     "UserAction",
     "Video",
+    "validate_a2ui_event",
     "validate_a2ui_message",
 ]
diff --git a/lib/crewai/src/crewai/a2a/extensions/a2ui/schema/v0_8/server_to_client_with_standard_catalog.json b/lib/crewai/src/crewai/a2a/extensions/a2ui/schema/v0_8/server_to_client_with_standard_catalog.json
index df6a8b5ff..fc62a6b73 100644
--- a/lib/crewai/src/crewai/a2a/extensions/a2ui/schema/v0_8/server_to_client_with_standard_catalog.json
+++ b/lib/crewai/src/crewai/a2a/extensions/a2ui/schema/v0_8/server_to_client_with_standard_catalog.json
@@ -701,6 +701,15 @@
                       "maxAllowedSelections": {
                         "type": "integer",
                         "description": "The maximum number of options that the user is allowed to select."
+                      },
+                      "variant": {
+                        "type": "string",
+                        "enum": ["checkbox", "chips"],
+                        "description": "The visual variant for the selection UI."
+                      },
+                      "filterable": {
+                        "type": "boolean",
+                        "description": "Whether options can be filtered by typing."
                       }
                     },
                     "required": ["selections", "options"]