sorted_set_range_by_lex

THE RISK

Low Risk

Why sorted_set_range_by_lex needs a policy

The tool name suggests a Redis-like sorted set range operation by lexicographic order, which would typically be a Read operation. However, the description is empty, providing no confirmation of its behavior. The tool also seems out of place on an EKS MCP server, which further reduces confidence. Defaulting to Other with low confidence due to insufficient information.

From the tool's definition Tool name is 'sorted_set_range_by_lex'; description is empty and uninformative.

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

POLICY

How to control sorted_set_range_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_range_by_lex:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "sorted_set_range_by_lex": {
      "limits": [
        {
          "counter": "sorted_set_range_by_lex_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

sorted_set_range_by_lex gets a rate cap, and 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.

SET A RULE FOR THIS TOOL →

Free to start. No card required.

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.
Tool risk categories → How PolicyLayer classifies MCP tools by what they can do.
MCP tool → What an MCP tool is and how clients discover and call it.
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_range_by_lex

What does the sorted_set_range_by_lex tool do? +

sorted_set_range_by_lex. It is categorised as a Other tool in the Amazon EKS MCP Server MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on sorted_set_range_by_lex? +

Register the Amazon EKS MCP Server MCP server in PolicyLayer and add a rule for sorted_set_range_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_range_by_lex? +

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

Can I rate-limit sorted_set_range_by_lex? +

Yes. Add a rate_limit block to the sorted_set_range_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_range_by_lex completely? +

Set action: deny in the PolicyLayer policy for sorted_set_range_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_range_by_lex? +

sorted_set_range_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 →