diff --git a/src/app-bridge.ts b/src/app-bridge.ts
index 6e1c0217..f9aaceac 100644
--- a/src/app-bridge.ts
+++ b/src/app-bridge.ts
@@ -135,7 +135,7 @@ export function getToolUiResourceUri(tool: Partial<Tool>): string | undefined {
  */
 export function isToolVisibilityModelOnly(tool: Partial<Tool>): boolean {
   const uiMeta = tool._meta?.ui as McpUiToolMeta | undefined;
-  const visibility = uiMeta?.visibility as Array<"model" | "app"> | undefined;
+  const visibility = uiMeta?.visibility;
   if (!visibility) return false;
   if (visibility.length === 1 && visibility[0] === "model") return true;
   return false;
@@ -149,7 +149,7 @@ export function isToolVisibilityModelOnly(tool: Partial<Tool>): boolean {
  */
 export function isToolVisibilityAppOnly(tool: Partial<Tool>): boolean {
   const uiMeta = tool._meta?.ui as McpUiToolMeta | undefined;
-  const visibility = uiMeta?.visibility as Array<"model" | "app"> | undefined;
+  const visibility = uiMeta?.visibility;
   if (!visibility) return false;
   if (visibility.length === 1 && visibility[0] === "app") return true;
   return false;