copy_image_set · Awslabs Valkey MCP: Risk & Policy

WHAT IT DOES

What copy_image_set does on Awslabs Valkey

AI agents use copy_image_set to create or update resources in Awslabs Valkey — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Awslabs Valkey environment.

WHY IT NEEDS A POLICY

Why copy_image_set needs a policy

The tool performs a copy operation, which is a reversible write action that creates new data. However, the description is empty, which reduces confidence. In the context of an AWS ElastiCache/MemoryDB Valkey server, this likely involves creating a duplicate of cached image data.

From the tool's definition Tool name 'copy_image_set' indicates a copy operation that creates a duplicate of an image set, which is a write action that creates new data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

copy_image_set Rate-limited

copy_image_set 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.

View as policy code

policy.json

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

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Awslabs Valkey, so you can run agents against it safely.

FAQ

Questions about copy_image_set

What does the copy_image_set tool do? +

copy_image_set. It is categorised as a Write tool in the Awslabs Valkey MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on copy_image_set? +

Register the Awslabs Valkey MCP server in PolicyLayer and add a rule for copy_image_set: 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 Awslabs Valkey. Nothing to install.

What risk level is copy_image_set? +

copy_image_set is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit copy_image_set? +

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

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

copy_image_set is provided by the Awslabs Valkey MCP server (awslabs.valkey-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.