UpdateAHORunCache · Awslabs Valkey MCP: Risk & Policy

WHAT IT DOES

What UpdateAHORunCache does on Awslabs Valkey

AI agents use UpdateAHORunCache 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 UpdateAHORunCache needs a policy

The tool performs a modification (Update) on cache infrastructure (AHO Run Cache). While the description is empty, the name strongly suggests reversible data modification rather than deletion, execution, or financial impact.

From the tool's definition Tool name 'UpdateAHORunCache' indicates modification of cache data. The server is 'Amazon ElastiCache/MemoryDB Valkey MCP Server' which manages in-memory data stores. 'Update' prefix explicitly denotes a write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

UpdateAHORunCache Rate-limited

UpdateAHORunCache 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": {
    "UpdateAHORunCache": {
      "limits": [
        {
          "counter": "updateahoruncache_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 UpdateAHORunCache

What does the UpdateAHORunCache tool do? +

UpdateAHORunCache. 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 UpdateAHORunCache? +

Register the Awslabs Valkey MCP server in PolicyLayer and add a rule for UpdateAHORunCache: 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 UpdateAHORunCache? +

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

Can I rate-limit UpdateAHORunCache? +

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

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

UpdateAHORunCache 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.