chore: import upstream snapshot with attribution

contributing/samples/mcp/mcp_stdio_notion_agent/agent.py

@@ -0,0 +1,47 @@
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import json
+import os
+
+from dotenv import load_dotenv
+from google.adk.agents.llm_agent import LlmAgent
+from google.adk.tools.mcp_tool.mcp_toolset import MCPToolset
+from google.adk.tools.mcp_tool.mcp_toolset import StdioServerParameters
+
+load_dotenv()
+
+NOTION_API_KEY = os.getenv("NOTION_API_KEY")
+NOTION_HEADERS = json.dumps({
+    "Authorization": f"Bearer {NOTION_API_KEY}",
+    "Notion-Version": "2022-06-28",
+})
+
+root_agent = LlmAgent(
+    name="notion_agent",
+    instruction=(
+        "You are my workspace assistant. "
+        "Use the provided tools to read, search, comment on, "
+        "or create Notion pages. Ask clarifying questions when unsure."
+    ),
+    tools=[
+        MCPToolset(
+            connection_params=StdioServerParameters(
+                command="npx",
+                args=["-y", "@notionhq/notion-mcp-server"],
+                env={"OPENAPI_MCP_HEADERS": NOTION_HEADERS},
+            )
+        )
+    ],
+)