diff --git a/src/gateway/protocol/schema/agents-models-skills.ts b/src/gateway/protocol/schema/agents-models-skills.ts
index aaa886dd5..2a578e9af 100644
--- a/src/gateway/protocol/schema/agents-models-skills.ts
+++ b/src/gateway/protocol/schema/agents-models-skills.ts
@@ -71,6 +71,7 @@ export const AgentsUpdateParamsSchema = Type.Object(
     workspace: Type.Optional(NonEmptyString),
     model: Type.Optional(NonEmptyString),
     avatar: Type.Optional(Type.String()),
+    emoji: Type.Optional(Type.String()),
   },
   { additionalProperties: false },
 );
