unity no custom tools available

As an AI language model, I cannot fully confirm the current availability of custom tools in Unity. However, according to Unity's official documentation, there are several custom tools and extensions available for use in Unity. These include third-party plugins, asset packs, and scripts that can be integrated into Unity to provide additional functionality and features beyond what is available in the standard Unity Editor. Some examples of custom tools that can be used in Unity include ProBuilder, which allows for easy 3D modeling and level design, and TextMesh Pro, which provides advanced text rendering capabilities. Additionally, Unity provides an extensive API that developers can use to create their own custom tools and extensions for the Unity Editor.