sorted_set_remove_by_lex

THE RISK

Medium Risk

Why sorted_set_remove_by_lex needs a policy

This tool removes data from a sorted set based on a lexicographical range. While removal operations are destructive in intent, this action is reversible if the data is backed up or the operation can be rolled back (common for modern data stores).

From the tool's definition Tool name 'sorted_set_remove_by_lex' contains 'remove', indicating deletion of set members within a lexicographical range. Description states 'Remove members by lexicographical range', confirming data modification.

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

POLICY

How to control sorted_set_remove_by_lex

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

policy.json

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

sorted_set_remove_by_lex 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 EKS 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 sorted_set_remove_by_lex

What does the sorted_set_remove_by_lex tool do? +

Remove members by lexicographical range. It is categorised as a Write tool in the Amazon EKS 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 sorted_set_remove_by_lex? +

Register the Amazon EKS MCP Server MCP server in PolicyLayer and add a rule for sorted_set_remove_by_lex: 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 EKS MCP Server. Nothing to install.

What risk level is sorted_set_remove_by_lex? +

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

Can I rate-limit sorted_set_remove_by_lex? +

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

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

sorted_set_remove_by_lex is provided by the Amazon EKS MCP Server MCP server (awslabs.eks-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 EKS MCP Server tool call.

Start from Amazon EKS 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 →