mtr · Network MCP Server MCP: Risk & Policy

WHAT IT DOES

What mtr does on Network MCP Server

AI agents invoke mtr to trigger actions in Network MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why mtr needs a policy

MTR is a standard Unix/Linux network diagnostic utility that executes live network operations — sending ICMP/UDP packets to trace routes and measure packet loss/latency across network hops. Based on the server context ('network diagnostic tools', 'connectivity testing') and the known behavior of the mtr command, this tool executes active network operations against external hosts.

From the tool's definition Tool name 'mtr' with empty description. MTR (Matt's Traceroute) is a well-known network diagnostic tool that combines ping and traceroute by executing network probes.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mtr Rate-limited

mtr 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.

View as policy code

policy.json

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

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Network MCP Server, so you can run agents against it safely.

FAQ

Questions about mtr

What does the mtr tool do? +

mtr. It is categorised as a Execute tool in the Network MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on mtr? +

Register the Network MCP Server MCP server in PolicyLayer and add a rule for mtr: 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 Network MCP Server. Nothing to install.

What risk level is mtr? +

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

Can I rate-limit mtr? +

Yes. Add a rate_limit block to the mtr 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 mtr completely? +

Set action: deny in the PolicyLayer policy for mtr. 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 mtr? +

mtr is provided by the Network MCP Server MCP server (labeveryday/network-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.