gistfile1.cs

public class ConsoleCommandRouter : MonoBehaviour {
    void Start () {
        var repo = ConsoleCommandsRepository.Instance;
        repo.RegisterCommand("toggle_boolean", ToggleBoolean);
    }

    public string ToggleBoolean(params string[] args) {
        // args is an array of strings representing all the words after "toggle_boolean" on the console line you typed
        // here is where you'd want to find whatever GameObject or class you'd want to modify and do your thing
        // might look something like:
        GameObject go = GameObject.Find("My GameObject");
        MyComponent comp = go.GetComponent<MyComponent>();
        bool oldValue = comp.MyBoolean;
        comp.MyBoolean = !oldValue;
    }
}