Running EditorScripts?

Is there a way to run scripts in tool mode? I am having trouble running this example:

```
@tool
extends EditorScript

func _run():
print("Hello from the Godot Editor!")
```

from https://docs.godotengine.org/en/stable/classes/class_editorscript.html

I get a `No standalone script found.` when I try to run `gdscript-godot-run-current-script` (which I assume is the equivalent of `godot -s `). Note that I don't use Hydra.