AI dictionary
Resources / AI dictionary / PromptSIGN IN ↗

12 / 22 · What sits around it?

Prompt

noun

The request you give an AI for one piece of work. If nothing says what the work is for, the AI guesses what matters.

A financial planner is recommending that Keith Brennan move an old personal pension to a new provider. The old provider's reply to the firm's questions runs to four pages. The planner pastes it into the AI product with a request from the firm's shared list of prompts: "Summarise this letter in five bullet points." The bullets cover the transfer value, fund, charges, exit charge and retirement age. Working from them, the planner writes in the draft suitability report that the plan has no guarantees. Before sign-off, compliance finds a guaranteed annuity rate on page three of the letter. The move would have given it up.

The AI did what it was asked. Nothing it was given said the summary was for moving the plan, where a guarantee is one of the first things to look for. That request was a prompt. A prompt is the request a person gives an AI for one piece of work, whether they type it or pick it from a saved list. It joins any documents and the product's standing instructions in the AI's context. Whatever these leave out about the purpose of the work, the AI fills with its own guess at what matters.

The firm's own request to the provider asked about guarantees by name, and a prompt can do the same. The comparison breaks at the answer: the provider answers from the plan's own records, and the AI from its reading of the letter. Even asked by name, the AI can miss a guarantee on page three and say there are none. That wrong answer reads exactly like a right one.

Not to be confused with

  • A person types or chooses a prompt for each piece of work. Instructions go with every piece of work, whoever is asking, and the person asking may never see them. Vendors often call them the system prompt.
  • The context is everything the AI is given for the work. The prompt is one part of it.
  • A prompt on a shared list, sometimes called a prompt library, makes the request the same every time. The AI can still answer it differently each time.
  • In back-office software, a prompt often means a message the software shows a person, such as a reminder that a review is due. An AI prompt goes the other way: a person gives it to the AI.

Overheard

PrincipalShould we take the five-bullet prompt off the shared list?

PlannerRewrite it. It should say the summary is for moving a pension and ask about guarantees and protected tax-free cash by name. Even then, I'll read the letter before anything goes in the report.

Where it sits

Prompt

Grey words are still being written.

Copy this entry

Paste it into Word, Google Docs, Notion or Apple Notes. Headings and links come with it.

Sources

Last reviewed 29 SEPT 2026

  1. Prompting best practices ↗Anthropic, Claude Platform documentation · 29 SEPT 2026
  2. Prompt engineering ↗OpenAI, API documentation · 29 SEPT 2026
  3. Lost in the Middle: How Language Models Use Long Contexts ↗Liu et al., Transactions of the Association for Computational Linguistics · 20 NOV 2023

Your feedback

Could you explain prompt to a colleague now?