sorted_set_range_by_lex

THE RISK

Low Risk

Why sorted_set_range_by_lex needs a policy

With no description available, classification is uncertain. The name suggests a read/query operation on a sorted set data structure using lexicographic range filtering, which would be a Read category. However, given the low confidence due to missing description and the fact that this tool appears in an Amazon Location Service MCP server context where the name doesn't align with location services, there is ambiguity.

From the tool's definition Tool description is empty and uninformative. Tool name 'sorted_set_range_by_lex' suggests a Redis-style sorted set range query operation by lexicographic ordering.

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 Location Service 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 Location Service 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 Location Service 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 Location Service 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 Location Service 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 Location Service MCP Server MCP server (awslabs.aws-location-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 Location Service MCP Server tool call.

Start from Amazon Location Service 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 →