diff --git a/tools.func.md b/tools.func.md
index 03c3dd5..c194150 100644
--- a/tools.func.md
+++ b/tools.func.md
@@ -1,5 +1,7 @@
 # This page describes all helper functions defined in `misc/tools.func`
 
+The tools.func file is automatically sourced and can be used in all $APP-install.sh files.
+
 ## `install_node_and_modules` Bash Function
 
 This function automates the installation of a specified version of Node.js and a list of global Node modules on a Debian-based system. It ensures the desired Node.js version is installed (replacing any existing version if necessary) and installs or updates specified Node.js global modules.