I'm still learning about agent isolation and tool execution. I've been reading about LangChain's tool validation and how OpenClaw handles the same problem.

My understanding is that LangChain often trusts the agent's tool-call output, which can lead to direct shell injection if the tool isn't sanitized properly. OpenClaw seems to have a validation layer before the tool executes.

Can someone explain a concrete example where OpenClaw's validation would block an attack that LangChain's default setup would allow? I'm particularly thinking about indirect prompt injections that try to manipulate the tool arguments.

Also, in which scenario does OpenClaw's stricter validation fail closed? Does it ever reject safe commands?