The end result of the Texinfo export process is the creation of an Info file.
This Info file's metadata has variables for category, title, and description:
#+TEXINFO_DIR_DESC that establish where in the Info hierarchy the file
Here is an example that writes to the Info directory file:
#+TEXINFO_DIR_CATEGORY: Emacs #+TEXINFO_DIR_TITLE: Org Mode: (org) #+TEXINFO_DIR_DESC: Outline-based notes management and organizer