An indication that someone already has all of the information necessary to complete a certain piece of work.
From UK TV show 'Taskmaster', created by comedian Alex Horne, in which comedians are asked to complete a series of tasks, each delivered on a sealed card. When contestants ask additional questions, Horne often responds with 'All the information's on the task', to indicate that they already have all of the instructions required (or that will be provided).
Watch a compilation here: https://www.youtube.com/watch?v=ugUWoShLCAU