list_rules

List all rules in a firewall group.

SERVERVultr MCP SOURCErsp2k/mcp-vultr

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/rsp2k-mcp-vultr/list-rules.md

WHAT IT DOES

What list_rules does on Vultr MCP

AI agents call list_rules to retrieve information from Vultr MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why list_rules is rated Low

This tool queries and retrieves firewall rules from a specified firewall group. It performs a read-only operation with no side effects, no data modification, and no irreversible actions. The blast radius is minimal as it only exposes existing configuration data without the ability to alter or delete rules.

From the tool's definition Tool name 'list_rules' and description 'List all rules in a firewall group' indicate a retrieval operation with no modification or destructive capability.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_rules safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Vultr MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For list_rules, this is the rule to start with:

list_rules Allowed

list_rules is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_rules": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Vultr MCP, apply this rule, and every list_rules call is checked against it from then on.

FAQ

Questions about list_rules

What does the list_rules tool do? +

List all rules in a firewall group. It is categorised as a Read tool in the Vultr MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_rules? +

Register the Vultr MCP server in PolicyLayer and add a rule for list_rules: 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 Vultr MCP. Nothing to install.

What risk level is list_rules? +

list_rules is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit list_rules? +

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

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

list_rules is provided by the Vultr MCP server (rsp2k/mcp-vultr). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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