list_subdomains

List all subdomains for a hosting package

SERVER20i MCP Server SOURCEcbrown35/20i-mcp

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/cbrown35-20i-mcp/list-subdomains.md

WHAT IT DOES

What list_subdomains does on 20i MCP Server

AI agents call list_subdomains to retrieve information from 20i MCP Server 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_subdomains is rated Low

This tool queries and returns subdomain information without modifying, deleting, or executing any operations. It is a read-only information retrieval function with minimal security risk, as it only exposes existing configuration data tied to the user's hosting account.

From the tool's definition Tool name 'list_subdomains' and description 'List all subdomains for a hosting package' indicate a retrieval operation with no side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_subdomains 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 list_subdomains, this is the rule to start with:

list_subdomains Allowed

list_subdomains 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_subdomains": {}
  }
}

ALLOW ONLY 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 list_subdomains call is checked against it from then on.

FAQ

Questions about list_subdomains

What does the list_subdomains tool do? +

List all subdomains for a hosting package. It is categorised as a Read tool in the 20i MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_subdomains? +

Register the 20i MCP Server MCP server in PolicyLayer and add a rule for list_subdomains: 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 list_subdomains? +

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

Can I rate-limit list_subdomains? +

Yes. Add a rate_limit block to the list_subdomains 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_subdomains completely? +

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

list_subdomains 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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