net.mac-vendor

SERVERMcp SOURCE@2sio/mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-2s-io-mcp/net.mac-vendor.md

WHAT IT DOES

What net.mac-vendor does on Mcp

AI agents call net.mac-vendor to retrieve information from Mcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why net.mac-vendor is rated Low

This tool retrieves and queries information from bundled IEEE registries to map a MAC address to its manufacturer. It is purely informational with no side effects, data modification, code execution, or financial impact. The operation is a straightforward read/lookup against static reference data.

From the tool's definition Tool 'Resolve a MAC address... to its IEEE-registered hardware vendor.' Performs lookup and returns vendor name, matched OUI, and decoded address bits with no modification of data or execution of code.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs net.mac-vendor safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For net.mac-vendor, this is the rule to start with:

net.mac-vendor Allowed

net.mac-vendor is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "net.mac-vendor": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp, apply this rule, and every net.mac-vendor call is checked against it from then on.

FAQ

Questions about net.mac-vendor

What does the net.mac-vendor tool do? +

Resolve a MAC address (or bare OUI prefix) to its IEEE-registered hardware vendor. Accepts any format (FC:FB:FB:01:02:03, fc-fb-fb-01-02-03, fcfb.fb01.0203, fcfbfb, or a 9-hex MA-S prefix). Longest-prefix match across the IEEE MA-L/MA-M/MA-S registries, so subdivided blocks resolve to the real manufacturer. Returns the vendor, matched OUI + registry, and decoded address bits: multicast/group, locally administered, or randomized (privacy) MAC. Bundled authoritative IEEE data, free. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on net.mac-vendor? +

Register the MCP server in PolicyLayer and add a rule for net.mac-vendor: 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 Mcp. Nothing to install.

What risk level is net.mac-vendor? +

net.mac-vendor is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit net.mac-vendor? +

Yes. Add a rate_limit block to the net.mac-vendor 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 net.mac-vendor completely? +

Set action: deny in the PolicyLayer policy for net.mac-vendor. 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 net.mac-vendor? +

net.mac-vendor is provided by the MCP server (@2sio/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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