# pfsense_create_system_certificate_signing_request_sign

A write tool on the Pfsense MCP server.

Agent View of the PolicyLayer registry record for `pfsense_create_system_certificate_signing_request_sign`. HTML page: https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-create-system-certificate-signing-request-sign

## Facts

- Tool: `pfsense_create_system_certificate_signing_request_sign`
- Server: Pfsense (`abl030/pfsense-mcp`) — https://policylayer.com/tools/abl030-pfsense-mcp.md
- Homepage: https://github.com/abl030/pfsense-mcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

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

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

## Why pfsense_create_system_certificate_signing_request_sign is rated Medium

Certificate signing requests and their signatures are cryptographic objects that modify the system state. Creating/signing CSRs is a reversible operation (certificates can be replaced or revoked), so this falls into Write rather than Destructive. However, severity is high because misconfigured certificates can disrupt VPN, TLS services, and authentication across the firewall infrastructure.

From the tool's own definition: "Tool name contains 'create' and 'sign' indicating creation/modification of certificates. Part of pfSense server with full firewall control (677 tools covering firewall rules, NAT, VPN, services, etc.)."

## Use case

AI agents use pfsense_create_system_certificate_signing_request_sign to create or update resources in Pfsense, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Pfsense environment.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Pfsense:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "pfsense_create_system_certificate_signing_request_sign": {
      "limits": [
        {
          "counter": "pfsense_create_system_certificate_signing_request_sign_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Pfsense (679)

- `pfsense_delete_auth_key` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-auth-key.md
- `pfsense_delete_auth_keys` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-auth-keys.md
- `pfsense_delete_diagnostics_arp_table` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-diagnostics-arp-table.md
- `pfsense_delete_diagnostics_arp_table_entry` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-diagnostics-arp-table-entry.md
- `pfsense_delete_diagnostics_config_history_revision` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-diagnostics-config-history-revision.md
- `pfsense_delete_diagnostics_config_history_revisions` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-diagnostics-config-history-revisions.md
- `pfsense_delete_diagnostics_table` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-diagnostics-table.md
- `pfsense_delete_firewall_alias` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-alias.md
- `pfsense_delete_firewall_aliases` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-aliases.md
- `pfsense_delete_firewall_nat_one_to_one_mapping` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-nat-one-to-one-mapping.md
- `pfsense_delete_firewall_nat_one_to_one_mappings` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-nat-one-to-one-mappings.md
- `pfsense_delete_firewall_nat_outbound_mapping` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-nat-outbound-mapping.md
- `pfsense_delete_firewall_nat_outbound_mappings` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-nat-outbound-mappings.md
- `pfsense_delete_firewall_nat_port_forward` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-nat-port-forward.md
- `pfsense_delete_firewall_nat_port_forwards` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-nat-port-forwards.md
- `pfsense_delete_firewall_rule` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-rule.md
- `pfsense_delete_firewall_rules` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-rules.md
- `pfsense_delete_firewall_schedule` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-schedule.md
- `pfsense_delete_firewall_schedule_time_range` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-schedule-time-range.md
- `pfsense_delete_firewall_schedule_time_ranges` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-schedule-time-ranges.md
- `pfsense_delete_firewall_schedules` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-schedules.md
- `pfsense_delete_firewall_state` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-state.md
- `pfsense_delete_firewall_states` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-states.md
- `pfsense_delete_firewall_traffic_shaper` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-traffic-shaper.md
- `pfsense_delete_firewall_traffic_shaper_limiter` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-traffic-shaper-limiter.md
- `pfsense_delete_firewall_traffic_shaper_limiter_bandwidth` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-traffic-shaper-limiter-bandwidth.md
- `pfsense_delete_firewall_traffic_shaper_limiter_bandwidths` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-traffic-shaper-limiter-bandwidths.md
- `pfsense_delete_firewall_traffic_shaper_limiter_queue` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-traffic-shaper-limiter-queue.md
- `pfsense_delete_firewall_traffic_shaper_limiter_queues` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-traffic-shaper-limiter-queues.md
- `pfsense_delete_firewall_traffic_shaper_queue` — Destructive — https://policylayer.com/tools/abl030-pfsense-mcp/pfsense-delete-firewall-traffic-shaper-queue.md
- …and 649 more: https://policylayer.com/tools/abl030-pfsense-mcp.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=abl030-pfsense-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/abl030-pfsense-mcp