chore: import upstream snapshot with attribution

examples/servers/simple-tool/README.md

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+
+A simple MCP server that exposes a website fetching tool.
+
+## Usage
+
+Start the server using either stdio (default) or Streamable HTTP transport:
+
+```bash
+# Using stdio transport (default)
+uv run mcp-simple-tool
+
+# Using Streamable HTTP transport on custom port
+uv run mcp-simple-tool --transport streamable-http --port 8000
+```
+
+The server exposes a tool named "fetch" that accepts one required argument:
+
+- `url`: The URL of the website to fetch
+
+## Example
+
+Using the MCP client, you can use the tool like this using the STDIO transport:
+
+```python
+import asyncio
+from mcp.client.session import ClientSession
+from mcp.client.stdio import StdioServerParameters, stdio_client
+
+
+async def main():
+    async with stdio_client(
+        StdioServerParameters(command="uv", args=["run", "mcp-simple-tool"])
+    ) as (read, write):
+        async with ClientSession(read, write) as session:
+            await session.initialize()
+
+            # List available tools
+            tools = await session.list_tools()
+            print(tools)
+
+            # Call the fetch tool
+            result = await session.call_tool("fetch", {"url": "https://example.com"})
+            print(result)
+
+
+asyncio.run(main())
+
+```