memory_list_actors · Amazon Redshift MCP Server MCP

WHAT IT DOES

What memory_list_actors does on Amazon Redshift MCP Server

AI agents call memory_list_actors to retrieve information from Amazon Redshift 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 memory_list_actors needs a policy

The 'list_actors' pattern in the name indicates a retrieval operation that queries in-memory state to enumerate actors. No description is provided, which reduces confidence, but the naming convention strongly suggests a read-only operation with no side effects. Even in a Redshift context, listing actors would be a metadata query operation without write, execute, or destructive capabilities.

From the tool's definition Tool name 'memory_list_actors' suggests listing/querying actors from memory state; typical MCP read operation. Description is empty, limiting confidence.

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

POLICY

How to control memory_list_actors

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

policy.json

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

memory_list_actors 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 Redshift 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 memory_list_actors

What does the memory_list_actors tool do? +

memory_list_actors. It is categorised as a Read tool in the Amazon Redshift MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on memory_list_actors? +

Register the Amazon Redshift MCP Server MCP server in PolicyLayer and add a rule for memory_list_actors: 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 Redshift MCP Server. Nothing to install.

What risk level is memory_list_actors? +

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

Can I rate-limit memory_list_actors? +

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

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

memory_list_actors is provided by the Amazon Redshift MCP Server MCP server (awslabs.redshift-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 Redshift MCP Server tool call.

Start from Amazon Redshift 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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