The documentation for an Asset is available in the UI by selecting "Help" tab on the Asset's main page. This section should provide all relevant information and necessary requirements that pertain to your Asset. As the owner of an Asset, you are the only one who can edit its documentation. This can be done by using CONS3RT's WYSIWYG editor, or by adding information to the Asset's properties file documentation section prior to importing.
Similarly, license information is available in the adjacent tab. This section includes what your Asset's license allows you to do. This information can be edited by using CONS3RT's WYSIWYG editor, or by adding the information to the Asset's properties file license section prior to importing.