Prompt Failure Mode Auditor
Hardens AI prompts and agent workflows against logic errors, tool-misuse, and prompt injection.
Free
Works with the AI tools you already use
See it in action
You say
Audit this customer support agent prompt. It has access to a 'refund_customer' tool and 'read_order_history'. It keeps getting tricked into giving refunds for non-existent orders.
Your agent does
Findings
| Severity | Issue | Fix |
| --- | --- | --- |
| High | No Order Validation | Require read_order_history confirmation before calling refund. |
| Med | Identity Spoofing | Verify customer_id against auth context, not user-provided text. |
Safer Rewrite
[Optimized instructions provided...]
About this skill
Secure and Optimize Your AI Agent Workflows
Deploying AI agents without a rigorous audit is a recipe for prompt injection, unintended tool execution, and "hallucinated" permissions. The Prompt Failure Mode Auditor acts as a professional security and logic review layer for your AI instructions and tool-calling workflows.
What it does
This skill systematically analyzes your prompts and agent instructions to find architectural weaknesses. It doesn't just look for typos; it investigates:
- Logical Contradictions: Conflicting priorities that cause agent loops or inconsistent behavior.
- Tool Boundaries: Vulnerabilities in how the agent handles destructive actions, payments, or private data through connected APIs.
- Injection Risks: How untrusted user input might hijack the agent's core instructions.
- Brittle Assumptions: Missing input requirements that lead to failure when data is incomplete.
Why use this skill?
Manually testing every edge case is impossible. This skill provides a structured Failure Mode Matrix and Evaluation Cases that you can use for automated or manual testing. It concludes with a production-ready rewrite of your prompt, implementing defensive engineering patterns that are difficult to write from scratch.
The Result
You receive a detailed report identifying severity-rated risks, a hardened version of your prompt, and 5-10 specific evaluation scenarios to ensure your agent stays within its sandbox.
How to install
Drop the file into your AI Agent. Works with Claude, Cursor, ChatGPT, and 20+ more.
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