tool_box!

The tool_box! macro generates an enum from multiple tool structs, simplifying dispatch.

tool_box!(GreetingTools, [SayHelloTool, SayGoodbyeTool]);

// Get all tool definitions
let tools: Vec<Tool> = GreetingTools::tools();

// Dispatch in handler
async fn handle_call_tool_request(
    &self, params: CallToolRequestParams, _runtime: Arc<dyn McpServer>,
) -> Result<CallToolResult, CallToolError> {
    let tool: GreetingTools = GreetingTools::try_from(params)?;

    match tool {
        GreetingTools::SayHelloTool(t) => t.call_tool(),
        GreetingTools::SayGoodbyeTool(t) => t.call_tool(),
    }
}

The generated enum implements TryFrom<CallToolRequestParams> and provides a tools() method that returns all tool definitions.

See the rust-mcp-filesystem project for a real-world example with many tools.