ListClustersByStatus | PolicyLayer

WHAT IT DOES

What ListClustersByStatus does on Amazon Bedrock Knowledge Base Retrieval MCP Server

AI agents call ListClustersByStatus to retrieve information from Amazon Bedrock Knowledge Base Retrieval MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why ListClustersByStatus needs a policy

This is a query/list operation that retrieves and returns information about database clusters based on status filtering. It has no side effects, does not modify data, execute code, delete resources, or affect financial state. The operation is purely informational and read-only, making it a Read category tool with low severity risk since misuse would only expose cluster status metadata.

From the tool's definition Tool name 'ListClustersByStatus' and description 'Returns a list of Timestream for InfluxDB DB clusters filtered by status' indicate a read-only retrieval operation that queries and filters existing cluster data without modification.

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

POLICY

How to control ListClustersByStatus

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 ListClustersByStatus:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "ListClustersByStatus": {}
  }
}

ListClustersByStatus is read-only, so it stays allowed — but 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.

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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.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
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 ListClustersByStatus

What does the ListClustersByStatus tool do? +

Returns a list of Timestream for InfluxDB DB clusters filtered by status (case-insensitive). It is categorised as a Read tool in the Amazon Bedrock Knowledge Base Retrieval MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on ListClustersByStatus? +

Register the Amazon Bedrock Knowledge Base Retrieval MCP Server MCP server in PolicyLayer and add a rule for ListClustersByStatus: 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 ListClustersByStatus? +

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

Can I rate-limit ListClustersByStatus? +

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

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

ListClustersByStatus 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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