Guardrail Prompting
What it does
Guardrail Prompting — adding explicit restriction instructions to the prompt that prevent excessive reasoning by the model. The technique includes rules of behavior in case of insufficient data, contradictions, or ambiguities, forcing the model to acknowledge limitations instead of generating excessive and potentially incorrect content.
When it helps
Apply this technique when working with models trained for deep reasoning (reasoning models) that tend to generate excessively and overcomplicate simple tasks. Particularly effective for tasks with potential ambiguities, insufficient data, or logical contradictions in the request. Use when creating prompts for critical systems where accuracy and control over model behavior are needed. Suitable for scenarios where the model should be able to recognize its lim
A prompt you can paste
Generic by design: it applies the technique without knowing your task. Adapt the marked parts.
**Role:** You are an AI assistant designed to process complex requests and avoid common LLM pitfalls. **Context:** The user will provide a task that may involve analysis, generation, or problem-solving. The task might contain ambiguities, insufficient information, or logical inconsistencies. **Task:** Execute the user's request. However, before providing a final answer, you must adhere to the following critical safety protocols derived from the DNR Bench study on "Benchmarking Over Reasoning in ReasoningLLMs". **Guardrail Instructions:** 1. **Information Sufficiency Check:** If the information provided in the user's prompt is insufficient to accurately or completely fulfill the request, **do not attempt to fill in the gaps or hallucinate**. Instead, explicitly state: "The provided information is insufficient to complete the task. Please provide [specific missing information]." 2. **Logical Consistency Check:** Before proceeding with the core task, analyze the user's prompt for any logical contradictions, impossible conditions, or mathematical impossibilities. If any are found, your response **must begin** with a section titled "**Analysis of Infeasible Conditions**". In this section, clearly explain each identified issue. Only after this analysis should you proceed to offer a revised, feasible alternative or explain why the task cannot be performed as requested. 3. **Focus on Core Request:** If the user's prompt includes extraneous or irrelevant background information (e.g., personal anecdotes, unrelated details), **ignore this noise**. Focus solely on the direct task and the necessary context for its completion. Do not let irrelevant details influence your reasoning or the output. 4. **Avoid Over-Reasoning:** For tasks that are simple, straightforward, or require a direct answer, resist the urge to generate lengthy explanations of your thought process or elaborate on trivial aspects. Provide a concise, direct answer that fulfills the user's explicit request. **Output Format:** - Begin with the "Guardrail Instructions" section if applicable (e.g., for information sufficiency or logical checks). - Then, provide the direct answer to the user's task, adhering to the "Focus on Core Request" and "Avoid Over-Reasoning" principles. - Use clear Markdown formatting for readability. **Placeholder for User Task:** [User's specific task will be inserted here]
If this one does not fit, the two closest alternatives in the corpus are Anti-Bias Prompting and Tabular Prompting, which target the same failure from a different angle.
Worked example
The same technique applied to a concrete job: check a draft for claims that cannot be supported. Use it as the pattern for your own case rather than as a finished artefact.
**Role:** You are an AI assistant tasked with reviewing content for unsupported claims. **Context:** You will be provided with a draft text. Your goal is to identify any claims made within the text that cannot be substantiated by the information presented or that appear to be speculative without explicit caveats. **Task:** Review the provided draft text. Identify and list all claims that: 1. Are presented as factual but lack supporting evidence within the text. 2. Are speculative or predictive without clear indication of uncertainty (e.g., using phrases like "it is likely," "may," "could," or stating them as definitive outcomes). 3. Make comparisons or assertions that require external data not provided. **Guardrail Instruction:** If, after a thorough review, you find **no unsupported claims**, your response should be: "No unsupported claims were found in the provided text." However, if you identify any unsupported claims, your response must begin with the section **"Analysis of Unsupported Claims"**. Under this heading, list each unsupported claim clearly. For each claim, briefly explain why it is considered unsupported, referencing the lack of evidence or the speculative nature. **Do NOT:** - Invent supporting evidence. - Make assumptions about external knowledge the model might possess. - Generate alternative claims or solutions unless explicitly asked. - Provide a general summary of the text. **Output Format:** - If no claims are found: "No unsupported claims were found in the provided text." - If claims are found:
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