create_firewall_rule · CloudStack MCP Server MCP

WHAT IT DOES

What create_firewall_rule does on CloudStack MCP Server

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

WHY IT NEEDS A POLICY

Why create_firewall_rule needs a policy

This tool creates a new firewall rule in CloudStack infrastructure, which is a write operation that modifies network security configurations. While it doesn't delete data (not Destructive) or move money (not Financial), it does modify infrastructure in a way that could affect network access controls and security posture.

From the tool's definition Tool name is 'create_firewall_rule' and description states 'Create firewall rule'. The verb 'create' indicates a write operation that modifies infrastructure configuration by adding a new firewall rule.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_firewall_rule Rate-limited

create_firewall_rule stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_firewall_rule": {
      "limits": [
        {
          "counter": "create_firewall_rule_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches CloudStack MCP Server, so you can run agents against it safely.

FAQ

Questions about create_firewall_rule

What does the create_firewall_rule tool do? +

Create firewall rule. It is categorised as a Write tool in the CloudStack MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_firewall_rule? +

Register the CloudStack MCP Server MCP server in PolicyLayer and add a rule for create_firewall_rule: 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 CloudStack MCP Server. Nothing to install.

What risk level is create_firewall_rule? +

create_firewall_rule is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_firewall_rule? +

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

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

create_firewall_rule is provided by the CloudStack MCP Server MCP server (mozg31337/cloudstack-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.