diff --git a/webui/src/types.ts b/webui/src/types.ts
index e7a80a6..2704251 100644
--- a/webui/src/types.ts
+++ b/webui/src/types.ts
@@ -365,11 +365,12 @@ export type OrganizationFunctionActionContext = PlatformRouteContext & {
 
 export type OrganizationFunctionActionContribution = {
   id: string;
-  label?: string;
+  label: string;
+  icon: ReactNode;
   order?: number;
   anyOf?: string[];
   allOf?: string[];
-  render: (context: OrganizationFunctionActionContext) => ReactNode;
+  onClick: (context: OrganizationFunctionActionContext) => void;
 };
 
 export type OrganizationFunctionActionsUiCapability = {
diff --git a/webui/tests/module-capabilities.test.ts b/webui/tests/module-capabilities.test.ts
index dc09fc3..21c70d2 100644
--- a/webui/tests/module-capabilities.test.ts
+++ b/webui/tests/module-capabilities.test.ts
@@ -1,4 +1,8 @@
-import type { PlatformWebModule } from "../src/types";
+import type {
+  OrganizationFunctionActionContext,
+  OrganizationFunctionActionContribution,
+  PlatformWebModule
+} from "../src/types";
 import {
   hasUiCapability,
   moduleInstalled,
@@ -67,3 +71,28 @@ assert(routes.join(",") === "/campaigns,/files,/mail", "routes should aggregate
 
 assert(scopeGrants("tenant:*", "calendar:event:read"), "tenant wildcard should grant tenant-level module scopes");
 assert(!scopeGrants("tenant:*", "system:settings:read"), "tenant wildcard should not grant system scopes");
+
+let selectedFunctionId = "";
+const functionAction: OrganizationFunctionActionContribution = {
+  id: "test.view-assignments",
+  label: "View assignments",
+  icon: "assignments-icon",
+  order: 40,
+  anyOf: ["idm:organization_assignment:read"],
+  onClick: (context) => {
+    selectedFunctionId = context.function.id;
+  }
+};
+functionAction.onClick({
+  settings: { apiBaseUrl: "", apiKey: "", accessToken: "" },
+  auth: {} as OrganizationFunctionActionContext["auth"],
+  function: {
+    id: "function-1",
+    tenant_id: "tenant-1",
+    organization_unit_id: "unit-1",
+    slug: "test-function",
+    name: "Test function"
+  }
+});
+assert(selectedFunctionId === "function-1", "organization function actions receive their row context");
+assert(!("render" in functionAction), "organization function actions expose metadata instead of arbitrary rendered controls");