Unlike gantt charts and traditional requirements documentation, agile artefacts are living, evolving, minimally sufficient, and designed to:
The Product Backlog provides a list of what teams will deliver next; the Sprint Backlog makes the team's current delivery plan transparent as it's kept up-to-date on a daily basis.
The Definition of Done makes it explicit how teams will make their work of sufficiently high enough quality so that it can be handed over to customers and (potentially) used immediately. It encompasses security, business readiness, and even compliance standards.
With just enough documentation in artefacts such as the Product Backlog and Sprint Backlog, backed by a Definition of Done, teams have tools that empower them to make decisions faster and use minimally sufficient documentation.