private void addDefaultTool(String filename) {
		try {
			InputStream is = ResourceManager.getResourceAsStream(filename);
			addToolTemplate(is, filename);
		}
		catch (Exception e) {
			Msg.showError(this, null, "Error", "Error loading default tool: " + filename, e);
		}
	}
Get the default tools from the defaultTools location.
Ghidra/Framework/Project/src/main/java/ghidra/framework/main/ToolActionManager.java