call_aws

THE RISK

High Risk

Why call_aws needs a policy

The name 'call_aws' strongly implies execution of arbitrary AWS API calls. Given the server manages SNS/SQS provisioning, this could encompass creating, modifying, or deleting queues/topics, sending messages, or other AWS operations. The empty description lowers confidence, but the potential blast radius is critical since unrestricted AWS API access could be destructive or financial.

From the tool's definition Tool name 'call_aws' on a server for Amazon SNS/SQS messaging services; description is empty and uninformative.

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

POLICY

How to control call_aws

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 call_aws:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "call_aws": {
      "limits": [
        {
          "counter": "call_aws_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

call_aws stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. 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.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Awslabs Amazon Sns Sqs tools

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All 805 Awslabs Amazon Sns Sqs tools →

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Go deeper

Govern code and CI agents → Branch allowlists, approval on merges, and rate caps on the build and pipeline tools agents trigger.
High-risk tools in Awslabs Amazon Sns Sqs → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →
PolicyLayer vs alternatives → How deterministic, per-call MCP policy compares with gateways, identity layers, and authorisation platforms.

FAQ

Questions about call_aws

What does the call_aws tool do? +

call_aws. It is categorised as a Execute tool in the Awslabs Amazon Sns Sqs MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on call_aws? +

Register the Awslabs Amazon Sns Sqs MCP server in PolicyLayer and add a rule for call_aws: 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 call_aws? +

call_aws is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit call_aws? +

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

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

call_aws 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.

CHECK YOUR STACK →