AI Agent System Prompt Designer
By Rania · Published · Updated
Design a production-ready system prompt for an AI agent — role, tools, guardrails, and output contract.
Tags: AI, Technical, Coding
Prompt template
## Agent System Prompt Design a system prompt for an AI agent that behaves predictably in production. ## The agent - [text: Agent name and one-line job] - [textarea: Tasks it must handle well] — include a tricky example - [dropdown: Claude, GPT, Gemini, Model-agnostic] target model ## Capabilities - [textarea: Tools it can call] — names and what each does - [dropdown: Ask the user, Pick the safest option, Refuse and explain] behaviour when uncertain ## Guardrails - [textarea: Things it must never do] - [multi: Cite sources, Stay in persona, Admit uncertainty, Keep responses short, Escalate to a human when stuck] - [toggle: Yes, No] define a strict output format (JSON or template) Write the complete system prompt: role and objective, tool usage rules, decision policy for edge cases, guardrails, and the output contract. Then list 3 test inputs that would catch the most likely failure modes.