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+# AgentTool with MCP Demo (Stdio Mode)
+
+This demo shows how `AgentTool` works with MCP (Model Context Protocol) toolsets using **stdio mode**.
+
+## Stdio vs SSE Mode
+
+This demo uses **stdio mode** where the MCP server runs as a subprocess:
+
+- **Simpler setup** - No need to start a separate server
+- **Auto-launched** - Server starts automatically when agent runs
+- **Local process** - Uses stdin/stdout for communication
+
+For the **SSE (remote server) version**, see [mcp_in_agent_tool_remote](../mcp_in_agent_tool_remote/).
+
+## Setup
+
+**No installation required!** The MCP server will be launched automatically using `uvx` when you run the agent.
+
+The demo uses `uvx` to fetch and run the MCP simple-tool server directly from the GitHub repository's subdirectory:
+
+```bash
+uvx --from 'git+https://github.com/modelcontextprotocol/python-sdk.git#subdirectory=examples/servers/simple-tool' \
+    mcp-simple-tool
+```
+
+This happens automatically via the stdio connection when the agent starts.
+
+## Running the Demo
+
+```bash
+adk web contributing/samples
+```
+
+Then select **mcp_in_agent_tool_stdio** from the list and interact with the agent.
+
+## Try These Prompts
+
+This demo uses **Gemini 2.5 Flash** as the model. Try these prompts:
+
+1. **Check available tools:**
+
+   ```
+   What tools do you have access to?
+   ```
+
+1. **Fetch and summarize JSON Schema specification:**
+
+   ```
+   Use the mcp_helper to fetch https://json-schema.org/specification and summarize the key features of JSON Schema
+   ```
+
+## Architecture
+
+```
+main_agent (root_agent)
+  │
+  └── AgentTool wrapping:
+        │
+        └── mcp_helper (sub_agent)
+              │
+              └── McpToolset (stdio connection)
+                    │
+                    └── MCP Server (subprocess via uvx)
+                          │
+                          └── uvx --from git+...#subdirectory=... mcp-simple-tool
+                                │
+                                └── Website Fetcher Tool
+```
+
+## Related
+
+- **Issue:** [#1112 - Using agent as tool outside of adk web doesn't exit cleanly](https://github.com/google/adk-python/issues/1112)
+- **Related Issue:** [#929 - LiteLLM giving error with OpenAI models and Grafana's MCP server](https://github.com/google/adk-python/issues/929)
+- **SSE Version:** [mcp_in_agent_tool_remote](../mcp_in_agent_tool_remote/) - Uses remote server connection