List firewall rules for a load balancer.
AI agents call list_firewall_rules to retrieve information from Vultr MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns existing firewall rules without creating, modifying, deleting, or executing any actions. It is a pure read operation with no side effects, fitting the Read category. The severity is low because retrieving firewall configuration information poses minimal risk even if accessed by an unauthorized agent.
From the tool's definition Tool name 'list_firewall_rules' and description 'List firewall rules for a load balancer' indicate a retrieval operation with no modification or execution of infrastructure.
Documented attack patterns abuse exactly the kind of access list_firewall_rules gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Vultr MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for list_firewall_rules:
{
"version": "1",
"default": "deny",
"tools": {
"list_firewall_rules": {}
}
}list_firewall_rules is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
List firewall rules for a load balancer. It is categorised as a Read tool in the Vultr MCP MCP Server, which means it retrieves data without modifying state.
Register the Vultr MCP server in PolicyLayer and add a rule for list_firewall_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.
list_firewall_rules is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_firewall_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.
Set action: deny in the PolicyLayer policy for list_firewall_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.
list_firewall_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.
Start from Vultr MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
284 Vultr MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.