describe_supported_languages

THE RISK

Low Risk

Why describe_supported_languages needs a policy

This tool appears to retrieve or list supported languages for SNS/SQS messaging services. It performs read-only introspection of service capabilities and does not modify, execute operations, or delete data. The 'describe' prefix is a common AWS API pattern for read operations that fetch configuration or metadata.

From the tool's definition Tool name 'describe_supported_languages' indicates a query/retrieval operation. The description is empty, which reduces confidence slightly, but the semantic meaning of 'describe' combined with 'supported_languages' strongly suggests introspection or metadata…

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

POLICY

How to control describe_supported_languages

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

policy.json

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

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

Create a free account and register Awslabs Amazon Sns Sqs — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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FAQ

Questions about describe_supported_languages

What does the describe_supported_languages tool do? +

describe_supported_languages. It is categorised as a Read tool in the Awslabs Amazon Sns Sqs MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on describe_supported_languages? +

Register the Awslabs Amazon Sns Sqs MCP server in PolicyLayer and add a rule for describe_supported_languages: 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 Awslabs Amazon Sns Sqs. Nothing to install.

What risk level is describe_supported_languages? +

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

Can I rate-limit describe_supported_languages? +

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

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

describe_supported_languages is provided by the Awslabs Amazon Sns Sqs MCP server (awslabs.amazon-sns-sqs-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Awslabs Amazon Sns Sqs tool call.

Start from Awslabs Amazon Sns Sqs, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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