An Idea should not stray beyond the specific meaning of its title; this impairs its ability to be re-used elsewhere because of its likely overlap with other ideas. Expounding beyond the meaning of the title ruins the re-usability of an idea.
For example, the subject of the idea shown below compares the prevalence of school shootings in the United States to other countries.
Because the idea doesn't have other reasons, it is allowed to have a description. And that description should not switch subjects to something unrelated like surrogacy, cancel culture, or looting. Instead, it should focus on providing more details about the number of shootings in various countries.