add_attachments_to_set · Awslabs Valkey MCP: Risk & Policy

WHAT IT DOES

What add_attachments_to_set does on Awslabs Valkey

AI agents use add_attachments_to_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 add_attachments_to_set needs a policy

The verb 'add' combined with 'attachments_to_set' suggests creating or appending records to a dataset, which is a reversible write operation. Without a description, there is ambiguity about what 'set' refers to and whether the operation could have broader side effects, lowering confidence to 0.65. The medium severity reflects that unintended data addition could corrupt state but is generally reversible.

From the tool's definition Tool name 'add_attachments_to_set' indicates a create/modify operation that adds data to a collection. The empty description prevents higher confidence.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_attachments_to_set Rate-limited

add_attachments_to_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": {
    "add_attachments_to_set": {
      "limits": [
        {
          "counter": "add_attachments_to_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 add_attachments_to_set

What does the add_attachments_to_set tool do? +

add_attachments_to_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 add_attachments_to_set? +

Register the Awslabs Valkey MCP server in PolicyLayer and add a rule for add_attachments_to_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 add_attachments_to_set? +

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

Can I rate-limit add_attachments_to_set? +

Yes. Add a rate_limit block to the add_attachments_to_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 add_attachments_to_set completely? +

Set action: deny in the PolicyLayer policy for add_attachments_to_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 add_attachments_to_set? +

add_attachments_to_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.