Tool
Building openclaw-shield: Lessons Learned Securing OpenClaw Agents
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Why it matters
openclaw-shield addresses a core agentic-security gap — prompt-based guardrails are advisory and cannot reliably block a direct command or tool call, so defenders need runtime enforcement in the tool path to prevent secret leakage and destructive execution.
Knostic has open-sourced openclaw-shield, a security plugin for OpenClaw AI agents that enforces guardrails at the tool/execution layer rather than relying on prompts or transcript scanning. It uses a 5-layer defense-in-depth approach (prompt guard, output scanner, and an execution gate requiring explicit allow/deny decisions) to stop agents from leaking secrets, exposing PII, or running destructive commands like rm -rf.