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Role Prompting: A Defined Perspective, Not a Magic Persona
Role prompting means specifying a perspective or a function that helps select the criteria

and the vocabulary, for instance: “Review the plan from the perspective of an operations
manager”, or “Explain the concept the way a trainer explains it to a beginner.” The benefit
is not that the model actually becomes that expert. It is that the role directs attention to

aspects of the task that matter.

A good role is specific and tied to an action: “You are a quality reviewer. Check the
consistency between the claims and the evidence, and do not review the style.” A weak role
is generic praise: “You are the best expert in the world.” Exaggeration may change the tone

of the answer, but it adds no source, no authority, and no real experience. The output must
therefore remain subject to a criterion and a source.

You can use more than one perspective separately rather than mixing them into a single
contradictory persona. Ask for an operational review, then a legal review limited to the
questions that need a specialist, then a communications review. The person then compares
the results. This is better than asking the system to be a manager, a lawyer, a designer, and

an accountant at once.

In teaching or research prompts, do not use a role to conceal the limits of use. Saying “act
as a physician” does not make the text a medical diagnosis, and saying “act as a researcher”

does not make the references real. Frame the role as a perspective that assists, and state
that high-impact decisions or claims require verification from a specialist and a source.

Positive and Negative Instructions
Negative instructions make clear what should be avoided, but they may leave a vacuum. “Do
not be long-winded” specifies neither a length nor a structure. It is better to add a positive

alternative: “Write 180 words in three paragraphs: the finding, the evidence, and the next
step.” Even so, some prohibitions remain important, such as “do not add figures that are not

present” or “do not disclose personal data.”

Write critical instructions directly and close to the task, and do not bury them at the end of
a long prompt. If you find yourself with a large list of prohibitions, ask whether the problem
calls for a template, a policy, or a validation tool rather than more sentences. An abundance

of negations can also make the prompt harder for a human being to review.

● Remember: Section summary

• Key idea: Examples set an implicit pattern, and a role sets a perspective. Neither adds
knowledge or authority.
• Practical decision: Use the smallest number of examples that make the pattern clear,
and tie every role to a concrete review function.

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