public static string ArgumentConfigToString<T>(this ICakeContext context, T obj)

This prints the values for each property that has a IReadOnlyArgumentAttribute bound to it that the user passed in.

public class MyConfig
    {
        [BooleanArgument(
            "dry_run",
            Description = "Set to 'true' to not do anything.",
            DefaultValue = false
        )]
        public bool DryRun { get; set; }
    }
    
    MyConfig config = CreateFromArguments<MyConfig>();
    Information( ArgumentConfigToString( config ) );
    
    // If cake --dry_run is set to true, this is what will be printed out:
    //
    // MyConfig's Configuration:
    //      -dry_run: True

This is an extension of ICakeContext, which means unless your config object has a reference to a ICakeContext, you can't call this function in a config object's ToString() function. If you *want* to do that, call ConfigToStringHelper<T>(T) directly (though you may need a "using Cake.ArgumentBinder" statement for that). Also, obviously, if the given object has no arguments binded to it, this isn't going to be helpful.