diff --git a/.gitignore b/.gitignore
index 896b2a161..b8f1c8aee 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,4 +23,4 @@ a2a_agents/python/a2ui_agent/src/a2ui/assets/**/*.json
 ## new agent SDK path
 agent_sdks/python/src/a2ui/assets/**/*.json
 ## Generated files for sandbox frame.
-samples/client/angular/projects/mcp_calculator/public/sandbox_iframe/
+samples/client/angular/projects/mcp_calculator/public/mcp_apps_inner_iframe/
diff --git a/samples/client/angular/package.json b/samples/client/angular/package.json
index cc6999c4d..84774fbb5 100644
--- a/samples/client/angular/package.json
+++ b/samples/client/angular/package.json
@@ -14,7 +14,7 @@
     "build:renderer": "cd ../../../renderers && for dir in 'web_core' 'markdown/markdown-it'; do (cd \"$dir\" && npm install && npm run build); done",
     "serve:agent:restaurant": "cd ../../agent/adk/restaurant_finder && uv run .",
     "demo:restaurant": "npm run build:renderer && concurrently -k -n \"AGENT,WEB\" -c \"magenta,blue\" \"npm run serve:agent:restaurant\" \"npm start -- restaurant\"",
-    "build:sandbox": "esbuild ../shared/sandbox_iframe/sandbox.ts --bundle --outfile=projects/mcp_calculator/public/sandbox_iframe/sandbox.js --format=esm --platform=browser --alias:@modelcontextprotocol/ext-apps/app-bridge=./node_modules/@modelcontextprotocol/ext-apps/dist/src/app-bridge.js && cp ../shared/sandbox_iframe/sandbox.html projects/mcp_calculator/public/sandbox_iframe/sandbox.html"
+    "build:sandbox": "esbuild ../shared/mcp_apps_inner_iframe/sandbox.ts --bundle --outfile=projects/mcp_calculator/public/mcp_apps_inner_iframe/sandbox.js --format=esm --platform=browser --alias:@modelcontextprotocol/ext-apps/app-bridge=./node_modules/@modelcontextprotocol/ext-apps/dist/src/app-bridge.js && cp ../shared/mcp_apps_inner_iframe/sandbox.html projects/mcp_calculator/public/mcp_apps_inner_iframe/sandbox.html"
   },
   "prettier": {
     "printWidth": 100,
diff --git a/samples/client/angular/projects/mcp_calculator/src/a2ui-catalog/mcp-app.ts b/samples/client/angular/projects/mcp_calculator/src/a2ui-catalog/mcp-app.ts
index 93de8c842..9b41d59d6 100644
--- a/samples/client/angular/projects/mcp_calculator/src/a2ui-catalog/mcp-app.ts
+++ b/samples/client/angular/projects/mcp_calculator/src/a2ui-catalog/mcp-app.ts
@@ -149,7 +149,7 @@ export class McpApp
     const disableSecuritySelfTest = urlParams.get('disable_security_self_test') === 'true';
 
     const currentOrigin = window.location.origin;
-    let sandboxUrl = `${currentOrigin}/sandbox_iframe/sandbox.html`;
+    let sandboxUrl = `${currentOrigin}/mcp_apps_inner_iframe/sandbox.html`;
     if (disableSecuritySelfTest) {
       sandboxUrl += '?disable_security_self_test=true';
     }
diff --git a/samples/client/lit/contact/ui/shared-constants.ts b/samples/client/lit/contact/ui/shared-constants.ts
index d99f2ff9d..2213f62d6 100644
--- a/samples/client/lit/contact/ui/shared-constants.ts
+++ b/samples/client/lit/contact/ui/shared-constants.ts
@@ -14,6 +14,6 @@
  * limitations under the License.
  */
 
-export const SANDBOX_BASE_PATH = "shared/sandbox_iframe/";
+export const SANDBOX_BASE_PATH = "shared/mcp_apps_inner_iframe/";
 export const SANDBOX_ENTRY_NAME = `${SANDBOX_BASE_PATH}sandbox`;
 export const SANDBOX_IFRAME_PATH = `/${SANDBOX_ENTRY_NAME}.html`;
diff --git a/samples/client/lit/contact/vite.config.ts b/samples/client/lit/contact/vite.config.ts
index 607739b86..86062a959 100644
--- a/samples/client/lit/contact/vite.config.ts
+++ b/samples/client/lit/contact/vite.config.ts
@@ -58,6 +58,7 @@ export default async () => {
       alias: {
         "@a2ui/markdown-it": resolve(__dirname, "../../../../renderers/markdown/markdown-it/dist/src/markdown.js"),
         "sandbox.js": resolve(__dirname, "../../" + SANDBOX_ENTRY_NAME + ".ts"),
+        "@modelcontextprotocol/ext-apps/app-bridge": resolve(__dirname, "../node_modules/@modelcontextprotocol/ext-apps/dist/src/app-bridge.js"),
       }
     },
     optimizeDeps: {
diff --git a/samples/client/shared/sandbox_iframe/README.md b/samples/client/shared/mcp_apps_inner_iframe/README.md
similarity index 97%
rename from samples/client/shared/sandbox_iframe/README.md
rename to samples/client/shared/mcp_apps_inner_iframe/README.md
index 26e6ac0ab..076cfb048 100644
--- a/samples/client/shared/sandbox_iframe/README.md
+++ b/samples/client/shared/mcp_apps_inner_iframe/README.md
@@ -1,4 +1,4 @@
-# Shared Sandbox iframe
+# Shared MCP Apps Inner iframe (Sandbox iframe)
 
 This directory contains the unified and reusable **Sandbox iframe** implementation for **A2UI applications** (Angular, Lit) to run **untrusted third-party Model Context Protocol (MCP) applications**.
 
diff --git a/samples/client/shared/sandbox_iframe/sandbox.html b/samples/client/shared/mcp_apps_inner_iframe/sandbox.html
similarity index 100%
rename from samples/client/shared/sandbox_iframe/sandbox.html
rename to samples/client/shared/mcp_apps_inner_iframe/sandbox.html
diff --git a/samples/client/shared/sandbox_iframe/sandbox.ts b/samples/client/shared/mcp_apps_inner_iframe/sandbox.ts
similarity index 100%
rename from samples/client/shared/sandbox_iframe/sandbox.ts
rename to samples/client/shared/mcp_apps_inner_iframe/sandbox.ts