Low Risk

list_get

Get value at index from list.

How to control list_get ↓

What list_get does on Amazon Data Processing MCP Server

AI agents call list_get to retrieve information from Amazon Data Processing MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Low Risk

Why list_get needs a policy

This tool retrieves a single value from a list at a specified index. It is a read-only operation that queries data without creating, modifying, deleting, or executing external operations. The action is idempotent and causes no state change. Low severity because even if misused by an agent, retrieving a list element has minimal blast radius.

From the tool's definition Tool name 'list_get' and description 'Get value at index from list' indicate a retrieval operation with no side effects.

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

How to control list_get

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

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_get": {}
  }
}

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

  1. Create a free account and register Amazon Data Processing MCP Server — nothing to install.
  2. Add this policy — paste it, or build it visually.
  3. Point your MCP client (Claude, Cursor, anything) at your gateway URL.
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Related tools and policies

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Questions about list_get

What does the list_get tool do? +

Get value at index from list. It is categorised as a Read tool in the Amazon Data Processing MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_get? +

Register the Amazon Data Processing MCP Server MCP server in PolicyLayer and add a rule for list_get: 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 Amazon Data Processing MCP Server. Nothing to install.

What risk level is list_get? +

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

Can I rate-limit list_get? +

Yes. Add a rate_limit block to the list_get 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_get completely? +

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

list_get is provided by the Amazon Data Processing MCP Server MCP server (awslabs.aws-dataprocessing-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 Amazon Data Processing MCP Server tool call.

Start from Amazon Data Processing MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

Free to start. No card required.

805 Amazon Data Processing MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.

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