add_inline_policy

THE RISK

Medium Risk

Why add_inline_policy needs a policy

The tool name 'add_inline_policy' strongly suggests creation or modification of AWS IAM inline policies, which would attach permissions to principals. This is a Write operation as it creates/modifies access control configuration. Severity is high because misconfigured IAM policies can grant unintended broad access.

From the tool's definition Tool name 'add_inline_policy' indicates policy attachment. Despite empty description, naming convention matches AWS IAM operations that modify access control rules.

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

POLICY

How to control add_inline_policy

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

policy.json

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

add_inline_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 Translate 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 →

Free to start. No card required.

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 add_inline_policy

What does the add_inline_policy tool do? +

add_inline_policy. It is categorised as a Write tool in the Amazon Translate 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 add_inline_policy? +

Register the Amazon Translate MCP Server MCP server in PolicyLayer and add a rule for add_inline_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 Translate MCP Server. Nothing to install.

What risk level is add_inline_policy? +

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

Can I rate-limit add_inline_policy? +

Yes. Add a rate_limit block to the add_inline_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 add_inline_policy completely? +

Set action: deny in the PolicyLayer policy for add_inline_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 add_inline_policy? +

add_inline_policy is provided by the Amazon Translate MCP Server MCP server (awslabs.amazon-translate-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 Translate MCP Server tool call.

Start from Amazon Translate 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 →