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2026-07-13 13:31:35 +08:00

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using System.ComponentModel;
using System.Text.Json;
using Microsoft.Extensions.Logging;
using ModelContextProtocol.Server;
namespace server;
[McpServerToolType]
public sealed class Tools
{
private readonly ILogger<Tools> _logger;
public Tools(ILogger<Tools> logger)
{
_logger = logger;
}
[McpServerTool, Description("Add two numbers together")]
public async Task<string> AddNumbers(
[Description("The first number")] int a,
[Description("The second number")] int b)
{
var result = a + b;
_logger.LogInformation("Adding {A} + {B} = {Result}", a, b, result);
return await Task.FromResult($"{a} + {b} = {result}");
}
[McpServerTool, Description("Multiply two numbers together")]
public async Task<string> MultiplyNumbers(
[Description("The first number")] int a,
[Description("The second number")] int b)
{
var result = a * b;
_logger.LogInformation("Multiplying {A} × {B} = {Result}", a, b, result);
return await Task.FromResult($"{a} × {b} = {result}");
}
[McpServerTool, Description("Generate a personalized greeting")]
public async Task<string> GetGreeting(
[Description("Name of the person to greet")] string name)
{
var greeting = $"Hello, {name}! Welcome to the MCP stdio server.";
_logger.LogInformation("Generated greeting for {Name}", name);
return await Task.FromResult(greeting);
}
[McpServerTool, Description("Get information about this MCP server")]
public async Task<string> GetServerInfo()
{
var serverInfo = new
{
server_name = "example-stdio-server",
version = "1.0.0",
transport = "stdio",
capabilities = new[] { "tools" },
description = "Example MCP server using stdio transport (MCP 2025-06-18 specification)"
};
var json = JsonSerializer.Serialize(serverInfo, new JsonSerializerOptions
{
WriteIndented = true
});
_logger.LogInformation("Providing server information");
return await Task.FromResult(json);
}
}