describe-serverless-caches

WHAT IT DOES

What describe-serverless-caches does on Amazon Bedrock Knowledge Base Retrieval MCP Server

AI agents call describe-serverless-caches 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 describe-serverless-caches needs a policy

Despite the empty description lowering confidence slightly, the 'describe-' prefix is a strong AWS convention for read-only queries that retrieve information about resources without side effects. This follows the same pattern as other AWS describe operations. The tool appears designed to list or inspect serverless cache properties, consistent with the Read category.

From the tool's definition Tool name 'describe-serverless-caches' indicates retrieval/inspection of existing serverless cache configurations. The 'describe' verb is typical of AWS read-only operations that query resource state.

Documented attack patterns abuse exactly the kind of access describe-serverless-caches gives an agent:

POLICY

How to control describe-serverless-caches

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 describe-serverless-caches:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "describe-serverless-caches": {}
  }
}

describe-serverless-caches 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.

CAP THIS TOOL →

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EXPLORE

Related tools and policies

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All 805 Amazon Bedrock Knowledge Base Retrieval MCP Server tools →

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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 describe-serverless-caches

What does the describe-serverless-caches tool do? +

describe-serverless-caches. 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 describe-serverless-caches? +

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

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

Can I rate-limit describe-serverless-caches? +

Yes. Add a rate_limit block to the describe-serverless-caches 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 describe-serverless-caches completely? +

Set action: deny in the PolicyLayer policy for describe-serverless-caches. 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 describe-serverless-caches? +

describe-serverless-caches 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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