modify-replication-group · Awslabs Valkey MCP: Risk & Policy

WHAT IT DOES

What modify-replication-group does on Awslabs Valkey

AI agents use modify-replication-group 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 modify-replication-group needs a policy

This tool modifies replication group settings, which creates or changes data/configuration reversibly. While the description is empty (lowering confidence slightly), the name strongly indicates Write category semantics.

From the tool's definition Tool name 'modify-replication-group' indicates modification of a replication group configuration in AWS ElastiCache/MemoryDB. The verb 'modify' clearly indicates write/update operations rather than read-only access.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

modify-replication-group Rate-limited

modify-replication-group 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": {
    "modify-replication-group": {
      "limits": [
        {
          "counter": "modify-replication-group_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 modify-replication-group

What does the modify-replication-group tool do? +

modify-replication-group. 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 modify-replication-group? +

Register the Awslabs Valkey MCP server in PolicyLayer and add a rule for modify-replication-group: 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 modify-replication-group? +

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

Can I rate-limit modify-replication-group? +

Yes. Add a rate_limit block to the modify-replication-group 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 modify-replication-group completely? +

Set action: deny in the PolicyLayer policy for modify-replication-group. 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 modify-replication-group? +

modify-replication-group 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.