sorted_set_remove_by_score

WHAT IT DOES

What sorted_set_remove_by_score does on Amazon Bedrock Knowledge Base Retrieval MCP Server

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

THE RISK

Medium Risk

Why sorted_set_remove_by_score needs a policy

This tool modifies data by removing members from a collection, which is a Write operation (reversible modification). While 'remove' could suggest Destructive intent, sorted set member removal is typically reversible (members can be re-added with their scores), and the operation scope is limited to score-range filtering rather than wholesale purge.

From the tool's definition Tool name 'sorted_set_remove_by_score' indicates removal of data members based on score range. The verb 'remove' combined with 'by score range' suggests selective deletion operations on a sorted set data structure.

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

POLICY

How to control sorted_set_remove_by_score

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

policy.json

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

sorted_set_remove_by_score 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 Bedrock Knowledge Base Retrieval 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

Related tools and policies

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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_score

What does the sorted_set_remove_by_score tool do? +

Remove members by score range. It is categorised as a Write tool in the Amazon Bedrock Knowledge Base Retrieval 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_score? +

Register the Amazon Bedrock Knowledge Base Retrieval MCP Server MCP server in PolicyLayer and add a rule for sorted_set_remove_by_score: 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 Bedrock Knowledge Base Retrieval MCP Server. Nothing to install.

What risk level is sorted_set_remove_by_score? +

sorted_set_remove_by_score 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_score? +

Yes. Add a rate_limit block to the sorted_set_remove_by_score 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_score completely? +

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

sorted_set_remove_by_score is provided by the Amazon Bedrock Knowledge Base Retrieval MCP Server MCP server (awslabs.bedrock-kb-retrieval-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 Bedrock Knowledge Base Retrieval MCP Server tool call.

Start from Amazon Bedrock Knowledge Base Retrieval MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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