omniwire_kernel

THE RISK

High Risk

Why omniwire_kernel needs a policy

This tool exposes privileged kernel-level operations. 'sysctl' can modify running kernel parameters (e.g., disable security features, change network stack behavior). 'modprobe' can load or unload kernel modules, fundamentally altering OS behavior or introducing rootkits. 'strace' and 'perf' can attach to arbitrary processes exposing sensitive data.

From the tool's definition Kernel-level operations: dmesg, sysctl, modprobe, lsmod, strace, perf — includes modprobe (load/unload kernel modules), sysctl (modify kernel parameters at runtime), and strace/perf (attach to processes for tracing)

Documented attack patterns abuse exactly the kind of access omniwire_kernel gives an agent:

POLICY

How to control omniwire_kernel

PolicyLayer is an MCP gateway — it sits between your AI agents and OmniWire, and nothing reaches the server without passing your rules. This is the rule we recommend for omniwire_kernel:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "omniwire_kernel": {
      "limits": [
        {
          "counter": "omniwire_kernel_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

omniwire_kernel stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register OmniWire — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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All 88 OmniWire tools →

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Go deeper

High-risk tools in OmniWire → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about omniwire_kernel

What does the omniwire_kernel tool do? +

Kernel-level operations: dmesg, sysctl, modprobe, lsmod, strace, perf. It is categorised as a Execute tool in the OmniWire MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on omniwire_kernel? +

Register the OmniWire MCP server in PolicyLayer and add a rule for omniwire_kernel: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches OmniWire. Nothing to install.

What risk level is omniwire_kernel? +

omniwire_kernel is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit omniwire_kernel? +

Yes. Add a rate_limit block to the omniwire_kernel rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block omniwire_kernel completely? +

Set action: deny in the PolicyLayer policy for omniwire_kernel. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides omniwire_kernel? +

omniwire_kernel is provided by the OmniWire MCP server (voidchecksum/omniwire). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every OmniWire tool call.

Start from OmniWire, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →