How much to provide in a story? What is the correct amount of information that a PO should provide for Agile Team?

I have written User Stories with varying length and have received different opinions on them. However, the best received User Stories from my team has been the one that are shorter that can be easily comprehended by entire Agile Team. Testing is made easy as well for these stories.

Additionally, I usually attach screenshot of specific UX area and not the entire page. This helps the team to focus on just that area and not get side tracked by other details on the page.