Manus in Practice: Briefing an Agent Without Handing Over the Keys

Delegation changes the unit of work

Most AI tools answer a question. An agent like Manus takes a goal: it plans steps, browses, writes files and returns something you can open. The useful shift is that you stop writing the sentence and start describing the outcome, which is exactly what makes the failure mode different. A wrong answer wastes a minute; a wrong action can send, publish, delete or spend something.

That distinction should decide what you hand over. Work that is broad but mechanical — gathering sources, drafting a deck, assembling a comparison — is good material. Decisions that need judgement, a relationship or accountability are not.

Write the brief, not the wish

“Research competitors and make a deck” is a wish. A brief says what the artefact is, which sources count, what the agent may touch and when it must stop and ask.

• Deliverable: the file or page you expect, its format and its audience.
• Boundaries: the accounts, folders and sites it may use, and the ones it must leave alone.
• Evidence: sources it must cite, and how it should mark what it could not verify.
• Stop condition: the point where it reports back instead of improvising.

A brief that fits in a paragraph is usually enough. The paragraph people skip is the boundaries, and those are the ones that decide whether the run was useful or expensive.

Review checkpoints beat a final read

An agent acts in steps, so review where the steps become irreversible: before sending, publishing, paying, deleting or connecting an account. Reading the output at the end catches awkward prose; it does not catch an action that already happened.

Keep a small log as you go — what it changed, where, and which source it used. Reproducibility is how you separate a lucky run from a process you can rely on, and it is also what makes a second pair of eyes possible.

Secrets, rights and other people’s data

Tasks typically run in the provider’s cloud, so uploads, instructions and any credentials you paste leave your machine. Give the agent the least access that still does the job, keep regulated records out of it, and treat the provider’s encryption and training statements as policies you are trusting rather than properties you can check.

Anything it reproduces carries someone’s licence, and anything it writes in your name is yours to stand behind. Attribution and disclosure do not become optional because a machine drafted the paragraph.

Cost, portability and when not to delegate

Agent work is usually metered. A long task can consume more than expected, and the model, limits and pricing can change between runs. Set a budget for the first few tasks, watch them closely, and keep the brief and the process in your own notes: the workflow should not live only inside a subscription.

Some work should stay human no matter how good the agent is — moving money, signing off legal or medical text, handling other people’s confidential data, and anything you cannot undo.

For the product itself, start with our Manus overview; the same delegation questions apply to Cue and to prompt tools such as Prompt Cowboy, and a coding agent like Freebuff has its own review rules. How we handle referral links is set out in our affiliate disclosure.