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AI Tool
hol-guard
Open-source antivirus for AI agents: block risky tools, secret access, prompt injection and malicious packages.
Day 43 since launch · Launched 25 August 2026
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What is hol-guard?
hol-guard is an open-source security layer for AI agents. It sits between your agent and its tools to block risky tool calls, secret exfiltration, prompt injection attempts and malicious packages before they execute — an antivirus-style guardrail for agentic workflows.
Pros
- Blocks prompt injection and secret leaks before tools run
- Open source and auditable
- Designed for real agent workflows
Cons
- Adds a policy layer you need to configure
- Geared toward technical teams
- Young project, ruleset still growing
Who should use hol-guard
Developers and teams running AI agents with tool access who want a security guardrail in front of them.
Who may not need it
Casual chatbot users without tool-using agents.
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