put_user_policy · Amazon Data Processing MCP Server MCP

WHAT IT DOES

What put_user_policy does on Amazon Data Processing MCP Server

AI agents use put_user_policy to create or update resources in Amazon Data Processing MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Amazon Data Processing MCP Server environment.

THE RISK

Medium Risk

Why put_user_policy needs a policy

This tool creates or updates user policies, which is a reversible Write operation. It does not delete policies (which would be Destructive), nor does it move money (Financial). While policy modification could enable privilege escalation if misused by an AI agent, the operation itself is Write-category. Severity is 'high' because policy changes affect access control and could be used to grant unauthorized permissions.

From the tool's definition Tool name 'put_user_policy' indicates creation or modification of IAM user policies in AWS. Sibling tool 'add_inline_policy' on the same server confirms this server handles policy attachment operations.

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

POLICY

How to control put_user_policy

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 put_user_policy:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "put_user_policy": {
      "limits": [
        {
          "counter": "put_user_policy_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

put_user_policy stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

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

LIMIT THIS TOOL →

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EXPLORE

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Go deeper

Govern customer-ops agents → PII redaction, approval on external messages, and no-bulk-delete rules on the records agents change.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
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 put_user_policy

What does the put_user_policy tool do? +

put_user_policy. It is categorised as a Write tool in the Amazon Data Processing MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on put_user_policy? +

Register the Amazon Data Processing MCP Server MCP server in PolicyLayer and add a rule for put_user_policy: 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 put_user_policy? +

put_user_policy is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit put_user_policy? +

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

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

put_user_policy 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.

CHECK YOUR STACK →

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