I have a set of established Web Services (W3C) on IIS servers and I want to expose their functionalities to LLMs using the Model Context Protocol (MCP). What is the recommended architectural pattern for connecting these two? Specifically:

● Should the MCP Server act as a wrapper/proxy that calls the Web Services internally, or is there a way to dynamically register API endpoints as MCP Tools?

● Are there existing tools or SDKs (especially for .NET) that can automatically generate MCP Tool?

● How should authentication be handled when the MCP Server needs to forward user credentials to the underlying Web Services?