get_dhcp_leases

A read tool on the OPNsense MCP server.

SERVEROPNsense MCP Server SOURCEfakebizprez/opnsense-mcp-server

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/fakebizprez-opnsense-mcp-server/get-dhcp-leases.md

WHAT IT DOES

What get_dhcp_leases does on OPNsense MCP Server

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

RISK

Why get_dhcp_leases is rated Low

This tool retrieves DHCP lease data from the OPNsense firewall for inspection purposes. It performs no modifications, deletion, execution, or financial transactions. The blast radius of misuse is minimal—an attacker gaining access could enumerate network clients but cannot alter system state or compromise operations. Classified as Read with low severity.

From the tool's definition Tool name 'get_dhcp_leases' and description 'Get DHCP leases' indicate a read-only query operation that retrieves existing DHCP lease information without modification.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_dhcp_leases safely

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

get_dhcp_leases Allowed

get_dhcp_leases 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": {
    "get_dhcp_leases": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect OPNsense MCP Server, apply this rule, and every get_dhcp_leases call is checked against it from then on.

FAQ

Questions about get_dhcp_leases

What does the get_dhcp_leases tool do? +

get_dhcp_leases is a read tool on the OPNsense MCP Server MCP server. It is categorised as a Read tool in the OPNsense MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_dhcp_leases? +

Register the OPNsense MCP Server MCP server in PolicyLayer and add a rule for get_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 OPNsense MCP Server. Nothing to install.

What risk level is get_dhcp_leases? +

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

Can I rate-limit get_dhcp_leases? +

Yes. Add a rate_limit block to the get_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 get_dhcp_leases completely? +

Set action: deny in the PolicyLayer policy for get_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 get_dhcp_leases? +

get_dhcp_leases is provided by the OPNsense MCP Server MCP server (fakebizprez/opnsense-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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