tag_resource · Awslabs Valkey MCP: Risk & Policy

WHAT IT DOES

What tag_resource does on Awslabs Valkey

AI agents use tag_resource 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 tag_resource needs a policy

Tagging a resource is a reversible write operation that adds or modifies metadata on a resource. With no description available, confidence is lowered, but the name strongly implies a Write action (tags can be removed). Severity is medium as misuse could alter resource metadata and affect cost allocation, access policies, or automation that depends on tags.

From the tool's definition Tool name is 'tag_resource'; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

tag_resource Rate-limited

tag_resource 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": {
    "tag_resource": {
      "limits": [
        {
          "counter": "tag_resource_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 tag_resource

What does the tag_resource tool do? +

tag_resource. 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 tag_resource? +

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

What risk level is tag_resource? +

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

Can I rate-limit tag_resource? +

Yes. Add a rate_limit block to the tag_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 tag_resource completely? +

Set action: deny in the PolicyLayer policy for tag_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 tag_resource? +

tag_resource 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.