arp_table

Show ARP/neighbor table entries (IP-to-MAC mappings) as structured records. interface: optional filter by network interface name. Returns list with ip, mac, interface, and state fields.

SERVERMcp Nettools SOURCEaaronckj/mcp-nettools

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/aaronckj-mcp-nettools/arp-table.md

WHAT IT DOES

What arp_table does on Mcp Nettools

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

RISK

Why arp_table is rated Low

This tool only reads system network state information (ARP tables) without side effects. It does not modify, delete, execute commands, or trigger external operations — it simply queries and presents existing network mapping data. The optional filtering parameter does not change the fundamental read-only nature.

From the tool's definition Tool 'arp_table' retrieves and displays existing ARP/neighbor table entries (IP-to-MAC mappings) as structured records with no modification or deletion capabilities. The description states it 'Show[s]' entries and 'Returns list' — purely a query operation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs arp_table safely

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

arp_table Allowed

arp_table 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": {
    "arp_table": {}
  }
}

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

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

FAQ

Questions about arp_table

What does the arp_table tool do? +

Show ARP/neighbor table entries (IP-to-MAC mappings) as structured records. interface: optional filter by network interface name. Returns list with ip, mac, interface, and state fields. It is categorised as a Read tool in the Mcp Nettools MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on arp_table? +

Register the Mcp Nettools MCP server in PolicyLayer and add a rule for arp_table: 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 Nettools. Nothing to install.

What risk level is arp_table? +

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

Can I rate-limit arp_table? +

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

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

arp_table is provided by the Mcp Nettools MCP server (aaronckj/mcp-nettools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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