list_tags_for_resource

WHAT IT DOES

What list_tags_for_resource does on Amazon Bedrock Knowledge Base Retrieval MCP Server

AI agents call list_tags_for_resource 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 list_tags_for_resource needs a policy

This tool retrieves tag metadata associated with AWS resources. It performs a read-only query operation with no side effects, no code execution, no data modification, and no destructive capability. The blast radius of misuse is minimal—exposing tags may reveal organizational metadata but does not enable unauthorized access or changes to resources themselves.

From the tool's definition Tool name 'list_tags_for_resource' and description 'List tags for a resource' indicate a retrieval operation that queries metadata without modifying or executing any state changes.

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

POLICY

How to control list_tags_for_resource

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 list_tags_for_resource:

policy.json

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

list_tags_for_resource 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

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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 list_tags_for_resource

What does the list_tags_for_resource tool do? +

List tags for a resource. 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 list_tags_for_resource? +

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

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

Can I rate-limit list_tags_for_resource? +

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

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

list_tags_for_resource 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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