# get_dhcp_leases

A read tool on the OPNsense MCP Server MCP server.

Agent View of the PolicyLayer registry record for `get_dhcp_leases`. HTML page: https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/get-dhcp-leases

## Facts

- Tool: `get_dhcp_leases`
- Server: OPNsense MCP Server (`fakebizprez/opnsense-mcp-server`) — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server.md
- Homepage: https://github.com/fakebizprez/opnsense-mcp-server
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_dhcp_leases",
    "arguments": {}
  }
}
```

## 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 own 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."

## Use case

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.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches OPNsense MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_dhcp_leases": {}
  }
}
```

## Other tools on OPNsense MCP Server (21)

- `delete_from_alias` — Destructive — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/delete-from-alias.md
- `firewall_delete_rule` — Destructive — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/firewall-delete-rule.md
- `exec_api_call` — Execute — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/exec-api-call.md
- `install_plugin` — Execute — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/install-plugin.md
- `restart_service` — Execute — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/restart-service.md
- `firewall_get_rules` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/firewall-get-rules.md
- `firewall_toggle_rule` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/firewall-toggle-rule.md
- `get_api_endpoints` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/get-api-endpoints.md
- `get_firewall_aliases` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/get-firewall-aliases.md
- `get_firewall_logs` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/get-firewall-logs.md
- `get_interfaces` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/get-interfaces.md
- `get_system_health` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/get-system-health.md
- `get_system_routes` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/get-system-routes.md
- `get_system_status` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/get-system-status.md
- `get_vpn_connections` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/get-vpn-connections.md
- `list_plugins` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/list-plugins.md
- `perform_firewall_audit` — Read — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/perform-firewall-audit.md
- `add_to_alias` — Write — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/add-to-alias.md
- `backup_config` — Write — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/backup-config.md
- `configure_opnsense_connection` — Write — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/configure-opnsense-connection.md
- `firewall_add_rule` — Write — https://policylayer.com/tools/fakebizprez-opnsense-mcp-server/firewall-add-rule.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=fakebizprez-opnsense-mcp-server · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/fakebizprez-opnsense-mcp-server