GPT-4o
⚙️ Technical
Basic
System Prompt Design for Custom AI Tools
Write a production-quality system prompt for a custom AI assistant — defining its role, knowledge scope, tone, output format, and safety guardrails.
The Prompt
# System Prompt Design for Custom AI Tools You are a prompt engineer. Write a production-ready system prompt for [AI TOOL NAME], a custom AI assistant built for [COMPANY NAME]. ## Tool Purpose What this assistant does: [TOOL PURPOSE, e.g. helps support agents respond to customer tickets, helps engineers write and review code, helps marketers draft copy] ## Role and Persona - Role: [ROLE DESCRIPTION] - Tone: [TONE, e.g. professional, friendly, precise] - Knowledge scope: [WHAT IT KNOWS and DOES NOT KNOW] ## Behavioral Rules Write the explicit dos and don'ts: - Always: [BEHAVIORS TO ALWAYS EXHIBIT] - Never: [BEHAVIORS TO ALWAYS AVOID] - When uncertain: [HOW TO HANDLE AMBIGUITY] ## Output Format Define the default output format for [TOOL]'s responses. Include length guidelines and structure. ## Safety Guardrails What topics or requests should this tool decline to handle, and how should it redirect the user? ## Full System Prompt Combine all of the above into a complete, ready-to-deploy system prompt.
📝 Fill in the blanks
Replace these placeholders with your own content:
[AI TOOL NAME]
[COMPANY NAME]
[TOOL PURPOSE, e.g. helps support agents respond to customer tickets, helps engineers write and review code, helps marketers draft copy]
[ROLE DESCRIPTION]
[TONE, e.g. professional, friendly, precise]
[WHAT IT KNOWS and DOES NOT KNOW]
[BEHAVIORS TO ALWAYS EXHIBIT]
[BEHAVIORS TO ALWAYS AVOID]
[HOW TO HANDLE AMBIGUITY]
[TOOL]
How to use this prompt
1
Copy the prompt
Click "Copy Prompt" above to copy the full prompt text to your clipboard.
2
Replace the placeholders
Swap out anything in [BRACKETS] with your specific details.
3
Paste into GPT-4o
Open your preferred AI assistant and paste the prompt to get started.