list_language_pairs

THE RISK

Low Risk

Why list_language_pairs needs a policy

This tool retrieves configuration or reference data about supported language pairs in a translation service. It performs a read-only operation that queries available options without modifying, executing, deleting, or committing any financial transactions. No data is created, modified, or destroyed.

From the tool's definition Tool name is 'list_language_pairs' and description states it 'List[s] all supported language pairs' and 'Returns all available source-target language combinations'. These are query/retrieval operations with no side effects.

Documented attack patterns abuse exactly the kind of access list_language_pairs gives an agent:

POLICY

How to control list_language_pairs

PolicyLayer is an MCP gateway — it sits between your AI agents and AWS, and nothing reaches the server without passing your rules. This is the rule we recommend for list_language_pairs:

policy.json

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

list_language_pairs is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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EXPLORE

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FAQ

Questions about list_language_pairs

What does the list_language_pairs tool do? +

List all supported language pairs for translation. Returns all available source-target language combinations with their capabilities. It is categorised as a Read tool in the AWS MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_language_pairs? +

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

What risk level is list_language_pairs? +

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

Can I rate-limit list_language_pairs? +

Yes. Add a rate_limit block to the list_language_pairs 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_language_pairs completely? +

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

list_language_pairs is provided by the AWS MCP server (@awslabs/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every AWS tool call.

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