On Github profiles, not all the repositories have description info listed underneath them. Only the repositories with recent updates contain detailed information.
This is necessary for users with a large number of repos so that page load times are acceptable (also, there's no need to show all repo info for someone with 1000+ repos).
To find out more about older repositories, you have to visit each repo page.
To help out with this manual process, I've created: Github: Get Missing Descriptions.
This script adds a button that will update "simple" repo listings with the project's description, as well as the last time it was updated. Each button click will make a max of 50 ajax requests. If there are more than 50 repos without descriptions, you will have to click the button multiple times.
You can check it out here:
Here is the current description from README.md:
Description
If there are missing descriptions on a Github profile page, a button will be added. When clicked, ajax requests will be made to grab the descriptions.
Screenshots
Before installing the user script:
After installing the user script:
Before clicking the button:
After clicking the button: