openwrt_list_dhcp_leases

THE RISK

Low Risk

Why openwrt_list_dhcp_leases needs a policy

This tool queries network state (DHCP lease table) to enumerate connected devices and their network identifiers (IP/MAC addresses). While it performs no mutations, the severity is medium rather than low because the information disclosed (device inventory, MAC addresses, IP allocations) could enable network reconnaissance or device targeting by a compromised agent, particularly in contexts where device enumeration is…

From the tool's definition Tool name contains 'list' and description states it 'List[s] all DHCP leases'; the action retrieves data about connected devices without modifying or deleting anything.

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

POLICY

How to control openwrt_list_dhcp_leases

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "openwrt_list_dhcp_leases": {}
  }
}

openwrt_list_dhcp_leases is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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

CAP THIS TOOL →

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EXPLORE

Related tools and policies

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All 23 OpenWRT SSH MCP Server tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about openwrt_list_dhcp_leases

What does the openwrt_list_dhcp_leases tool do? +

List all DHCP leases (connected devices with IP/MAC addresses). It is categorised as a Read tool in the OpenWRT SSH MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on openwrt_list_dhcp_leases? +

Register the OpenWRT SSH MCP Server MCP server in PolicyLayer and add a rule for openwrt_list_dhcp_leases: 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 OpenWRT SSH MCP Server. Nothing to install.

What risk level is openwrt_list_dhcp_leases? +

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

Can I rate-limit openwrt_list_dhcp_leases? +

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

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

openwrt_list_dhcp_leases is provided by the OpenWRT SSH MCP Server MCP server (jsebgiraldo/openwrt_ssh_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every OpenWRT SSH MCP Server tool call.

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

CHECK YOUR STACK →