# set_cluster_firewall_options

A write tool on the Proxmox MCP Server MCP server.

Agent View of the PolicyLayer registry record for `set_cluster_firewall_options`. HTML page: https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/set-cluster-firewall-options

## Facts

- Tool: `set_cluster_firewall_options`
- Server: Proxmox MCP Server (`gethosthewalrus/proxmox-mcp`) — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp.md
- Homepage: https://github.com/GethosTheWalrus/proxmox-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": "set_cluster_firewall_options",
    "arguments": {}
  }
}
```

## Why set_cluster_firewall_options is rated Medium

This tool modifies firewall configuration at the cluster level, which is a reversible write operation but with high blast radius due to potential network disruption across the entire Proxmox cluster. The ability to alter cluster firewall rules could impact availability and security of all VMs/containers.

From the tool's own definition: "Tool name 'set_cluster_firewall_options' indicates modification of cluster-wide firewall configuration. Empty description reduces specificity, but the 'set_' prefix and 'cluster' scope indicate write-level changes to infrastructure security settings affecting…"

## Use case

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

## Recommended policy (PolicyLayer)

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

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

## Other tools on Proxmox MCP Server (285)

- `convert_container_to_template` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/convert-container-to-template.md
- `convert_vm_to_template` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/convert-vm-to-template.md
- `delete_backup_job` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-backup-job.md
- `delete_cluster_firewall_rule` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-cluster-firewall-rule.md
- `delete_container` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-container.md
- `delete_container_snapshot` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-container-snapshot.md
- `delete_firewall_alias` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-firewall-alias.md
- `delete_firewall_ipset_entry` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-firewall-ipset-entry.md
- `delete_group` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-group.md
- `delete_ha_group` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-ha-group.md
- `delete_ha_resource` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-ha-resource.md
- `delete_pool` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-pool.md
- `delete_replication_job` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-replication-job.md
- `delete_role` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-role.md
- `delete_sdn_vnet` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-sdn-vnet.md
- `delete_sdn_zone` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-sdn-zone.md
- `delete_storage` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-storage.md
- `delete_storage_volume` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-storage-volume.md
- `delete_user` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-user.md
- `delete_user_token` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-user-token.md
- `delete_vm` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-vm.md
- `delete_vm_snapshot` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/delete-vm-snapshot.md
- `initialize_gpt` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/initialize-gpt.md
- `prune_storage_backups` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/prune-storage-backups.md
- `rollback_container_snapshot` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/rollback-container-snapshot.md
- `rollback_vm_snapshot` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/rollback-vm-snapshot.md
- `shutdown_vm` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/shutdown-vm.md
- `stopall_node` — Destructive — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/stopall-node.md
- `apply_sdn_changes` — Execute — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/apply-sdn-changes.md
- `bulk_migrate_guests` — Execute — https://policylayer.com/tools/gethosthewalrus-proxmox-mcp/bulk-migrate-guests.md
- …and 255 more: https://policylayer.com/tools/gethosthewalrus-proxmox-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=gethosthewalrus-proxmox-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/gethosthewalrus-proxmox-mcp