update_vps_reverse_dns

Update VPS reverse DNS records

SERVER20i MCP Server SOURCEcbrown35/20i-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/cbrown35-20i-mcp/update-vps-reverse-dns.md

WHAT IT DOES

What update_vps_reverse_dns does on 20i MCP Server

AI agents use update_vps_reverse_dns to create or update resources in 20i MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your 20i MCP Server environment.

RISK

Why update_vps_reverse_dns is rated Medium

This tool updates (modifies) DNS reverse records for VPS infrastructure. While reversible, incorrect reverse DNS changes can break email deliverability, cause authentication failures (SPF/DKIM/DMARC), and impact VPS reputation.

From the tool's definition Tool name explicitly uses 'update' indicating modification; description states 'Update VPS reverse DNS records' which modifies DNS configuration without deletion

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs update_vps_reverse_dns safely

PolicyLayer is an MCP gateway: it sits between your AI agents and 20i MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For update_vps_reverse_dns, this is the rule to start with:

update_vps_reverse_dns Rate-limited

update_vps_reverse_dns 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": {
    "update_vps_reverse_dns": {
      "limits": [
        {
          "counter": "update_vps_reverse_dns_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect 20i MCP Server, apply this rule, and every update_vps_reverse_dns call is checked against it from then on.

FAQ

Questions about update_vps_reverse_dns

What does the update_vps_reverse_dns tool do? +

Update VPS reverse DNS records. It is categorised as a Write tool in the 20i 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 update_vps_reverse_dns? +

Register the 20i MCP Server MCP server in PolicyLayer and add a rule for update_vps_reverse_dns: 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 20i MCP Server. Nothing to install.

What risk level is update_vps_reverse_dns? +

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

Can I rate-limit update_vps_reverse_dns? +

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

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

update_vps_reverse_dns is provided by the 20i MCP Server MCP server (cbrown35/20i-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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