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How to write better AI prompts: brief it like a new colleague

Vague questions get vague answers. Here is how to brief an AI assistant so the first answer is useful.

Ask It Right cover
AI already writes well. What it lacks is your situation. A four-part brief gives it the role, the task, the facts and the shape of a good answer.
The idea

Why one-line requests fail

Imagine handing a new colleague a sticky note that says “Write to the client about the delay.” Which client? Which delay? What do you want them to feel and do? Should it be an email or a WhatsApp message? They would guess, and so does AI.

A one-line request……leaves AI to guessSo you get
“Write to the client about the delay.”Who, why, how long, what you offerA vague apology
“Summarise this report.”For whom, how long, what mattersA summary of the wrong things
“Give me ideas for our Diwali offer.”Your business, budget, customersIdeas for a different business
“Make this better.”Better how: shorter, warmer, clearer?Changes you didn't want
The method

The four parts of a brief

Every good brief, to a person or to AI, answers four questions. Learn them as R-T-C-F: role, task, context, format.

Diagram: The four parts of a brief
From the book (Book 2, page 5)
PartThe questionExample
RoleWho should AI act as, and for whom?“You are helping the operations manager of a logistics firm.”
TaskWhat exactly should it do?“Draft an email to a client explaining a two-day delay.”
ContextWhat facts does it need?“Client: Sunrise Foods. 6 trucks held at the Gujarat border check on 14 October. New delivery: 17 October. No extra cost to them.”
FormatWhat does a good answer look like?“Under 120 words, calm and factual, end with a direct phone number.”
The method

Role: who should it act as?

Telling AI who it is acting as, and who it is helping, changes vocabulary, depth and assumptions. A role is a shortcut to dozens of unstated expectations.

Role you giveWhat changes in the answer
“You are an experienced CFO advising a small manufacturer.”Talks about cash flow and margins, not theory
“You are helping a first-time manager.”Simpler words, more explanation
“Act as a sceptical bank credit officer.”Asks hard questions about risk
“You are a patient trainer explaining to warehouse staff.”Short sentences, practical examples
“You are an editor who cuts ruthlessly.”Shorter, sharper text
The method

Task: one clear verb

Start the task with a single, precise verb. Vague verbs (“help with”, “look at”, “work on”) produce vague answers.

Useful verbsWhen
Draft · Rewrite · Shorten · TranslateYou want text produced or changed
Summarise · List · Extract · CompareYou want information organised
Explain · Teach · DefineYou want to understand something
Suggest · Rank · Critique · Argue againstYou want ideas or judgement to react to
The method

Context: the facts only you know

Context is everything AI cannot know: the people, the history, the numbers, your limits and what you want to happen next. It is the difference between a generic answer and one you can use.

Kind of contextExample
Who is involved“Mr Rathi, logistics head, has worked with us for four years; usually reasonable.”
What happened“Six trucks were held at a border check for 40 hours.”
Numbers that matter“Their order: 2,400 cartons. Penalty in contract: 1% per day after 48 hours.”
Your limits“We can't waive the next invoice; we can give priority loading next week.”
What you want“Keep the account; avoid the penalty being applied.”
What to avoid“Don't blame the client's late documents, even though they were late.”
Try it yourself

Questions from the worksheet: Rewrite three requests

Take three one-line requests you made to AI recently (or would make). Rewrite each as a four-part brief.

  1. Request 1: the original one line
  2. Request 1 rewritten: role · task · context · format
  3. Request 2: the original one line
  4. Request 2 rewritten
  5. Request 3: the original one line
  6. Request 3 rewritten
In three lines

What to remember

  1. One-line requests leave AI to guess; every guess becomes an edit later.
  2. A brief has four parts: role, task, context, format. Context matters most.
  3. Start the task with one clear verb, and say what good looks like.
Brief
An instruction with role, task, context and format.
Role
Who AI should act as, and who it is helping.
Format
The length, structure, tone, language and channel of the answer.

This article is adapted from the book. Examples marked “Example” use invented names and numbers; company stories are based on public sources listed in the book. For general learning; use your own judgement for your situation.