How to provide description for class level and mcp server level

[subbuj9]

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Question Category

• Protocol Specification
• SDK Usage
• Server Implementation
• General Implementation
• Documentation
• Other

Your Question

Hi have an existing .net web api app and I made the necessary changes for MCP compliance. I have add description at class and method/api level. When i call list tools, request has method/API description but does not have class level description.

How to add class level and mcp server level description?

[mikekistler]

There is no "class description" or "server description" returned in a ListTools result. Can you describe what you were expecting in more detail?

[subbuj9]

When I call list tools (method:tools/list), as part of the response I am able to see tool description, type, name but I am not seeing any class level information like description. See the below sample screenshots for your reference.

[PederHP]

This is by design. MCP doesn't have a concept of a class, so that description cannot map to anything in the list tools response.

I would also advise against porting APIs to tools one to one like this. You will generally have better results designing the tools separately as a kind of facade or adapter.

[PederHP]

You can add server instructions like in this sample:

csharp-sdk/tests/ModelContextProtocol.TestServer/Program.cs

Lines 40 to 44 in 66ba342

	McpServerOptions options = new()
	{
	Capabilities = new ServerCapabilities(),
	ServerInstructions = "This is a test server with only stub functionality",
	};

Note that this is returned to the client as part of the initialization handshake and not with each ListTools result.