list_countries

Get a list of all countries with ISO codes, calling codes, and continent. Parameters: (no parameters needed)

SERVERX402 Middleware SOURCE@gadgethumans/x402

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/com-gadgethumans-swarm-x402-middleware/list-countries.md

WHAT IT DOES

What list_countries does on X402 Middleware

AI agents call list_countries to retrieve information from X402 Middleware 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_countries is rated Low

This tool performs a simple data retrieval operation returning static reference information (country codes, calling codes, continent mappings). There are no side effects, no data modification, no code execution, and no financial operations involved. It is purely informational and read-only, making it a low-severity Read category tool.

From the tool's definition Tool name is 'list_countries' and description states it 'Get a list of all countries with ISO codes, calling calls, and continent' with no parameters. This retrieves reference data with no side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_countries safely

PolicyLayer is an MCP gateway: it sits between your AI agents and X402 Middleware, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For list_countries, this is the rule to start with:

list_countries Allowed

list_countries 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_countries": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect X402 Middleware, apply this rule, and every list_countries call is checked against it from then on.

FAQ

Questions about list_countries

What does the list_countries tool do? +

Get a list of all countries with ISO codes, calling codes, and continent. Parameters: (no parameters needed). It is categorised as a Read tool in the X402 Middleware MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_countries? +

Register the X402 Middleware MCP server in PolicyLayer and add a rule for list_countries: 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 X402 Middleware. Nothing to install.

What risk level is list_countries? +

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

Can I rate-limit list_countries? +

Yes. Add a rate_limit block to the list_countries 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_countries completely? +

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

list_countries is provided by the X402 Middleware MCP server (@gadgethumans/x402). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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