ccx_create_firewall_rule · Severalnines CCX MCP Server MCP

WHAT IT DOES

What ccx_create_firewall_rule does on Severalnines CCX MCP Server

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

WHY IT NEEDS A POLICY

Why ccx_create_firewall_rule needs a policy

This tool creates new firewall rules that modify network access policies for database clusters. While not directly destructive or financial, it is a Write operation that alters security configurations with potentially significant blast radius: misconfigured rules could grant unintended network access to sensitive databases or inadvertently expose systems.

From the tool's definition Tool description states 'Add a trusted source (firewall rule)' and 'Allows the specified CIDR to connect to the database', indicating modification of access control rules.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

ccx_create_firewall_rule Rate-limited

ccx_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": {
    "ccx_create_firewall_rule": {
      "limits": [
        {
          "counter": "ccx_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 Severalnines CCX MCP Server, so you can run agents against it safely.

FAQ

Questions about ccx_create_firewall_rule

What does the ccx_create_firewall_rule tool do? +

Add a trusted source (firewall rule) to a CCX datastore. Allows the specified CIDR to connect to the database. It is categorised as a Write tool in the Severalnines CCX 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 ccx_create_firewall_rule? +

Register the Severalnines CCX MCP Server MCP server in PolicyLayer and add a rule for ccx_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 Severalnines CCX MCP Server. Nothing to install.

What risk level is ccx_create_firewall_rule? +

ccx_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 ccx_create_firewall_rule? +

Yes. Add a rate_limit block to the ccx_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 ccx_create_firewall_rule completely? +

Set action: deny in the PolicyLayer policy for ccx_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 ccx_create_firewall_rule? +

ccx_create_firewall_rule is provided by the Severalnines CCX MCP Server MCP server (severalnines/ccx-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.