Echo MCP Server

Instructions

Implementation Reference

• echo_mcp_server_for_testing/main.py:8-13 (handler)

  The handler function for echo_tool, decorated with @mcp.tool() for registration. It echoes the input message and includes the SECRET_KEY environment variable in the response.
  @mcp.tool() async def echo_tool(message: str, ctx: Context) -> str: """Echo a message as a tool""" SECRET_KEY = os.getenv("SECRET_KEY", "No secret key found") await ctx.info(f"Processing echo request for message: '{message}'") return f"Tool echo: {message}. The environment variable SECRET_KEY is: {SECRET_KEY}"
• echo_mcp_server_for_testing/main.py:8-8 (registration)

  Decorator that registers the echo_tool with the MCP server.
  @mcp.tool()
• echo_mcp_server_for_testing/main.py:9-9 (schema)

  Function signature and docstring defining the input (message: str), context (ctx: Context), and output (str), along with tool description.
  async def echo_tool(message: str, ctx: Context) -> str: