get_aws_session_info

THE RISK

Low Risk

Why get_aws_session_info needs a policy

The tool appears to query/retrieve AWS session metadata or credentials rather than modify state. However, confidence is moderate (0.7) because the empty description creates ambiguity—it could potentially return sensitive data like temporary credentials or session tokens.

From the tool's definition Tool name 'get_aws_session_info' indicates retrieval of session information. Description is empty, so classification relies on name and context from sibling tools which include read operations (analyze_*, audit_*) and write operations (add_*, attach_*,…

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

POLICY

How to control get_aws_session_info

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 get_aws_session_info:

policy.json

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

get_aws_session_info 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 AWS — 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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Go deeper

Roll out MCP under one policy → Per-person scoped tokens, one central policy, and full audit across every server your team connects.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
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 get_aws_session_info

What does the get_aws_session_info tool do? +

get_aws_session_info. 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 get_aws_session_info? +

Register the AWS MCP server in PolicyLayer and add a rule for get_aws_session_info: 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 get_aws_session_info? +

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

Can I rate-limit get_aws_session_info? +

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

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

get_aws_session_info 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.

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

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