insert · Awslabs Valkey MCP: Risk & Policy

WHAT IT DOES

What insert does on Awslabs Valkey

AI agents use insert 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 insert needs a policy

The 'insert' operation on a Valkey cache server creates or adds data entries, which is reversible (can be deleted or updated later). This is a Write-category operation. Severity is high because unchecked inserts by an AI agent could pollute the cache with incorrect data, cause memory exhaustion, or interfere with application functionality.

From the tool's definition Tool name 'insert' on an ElastiCache/MemoryDB Valkey server indicates data insertion into a cache/database. The empty description limits certainty, but 'insert' is a standard Write operation that creates or modifies data in a Valkey data store.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

insert Rate-limited

insert 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": {
    "insert": {
      "limits": [
        {
          "counter": "insert_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 insert

What does the insert tool do? +

insert. 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 insert? +

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

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

Can I rate-limit insert? +

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

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

insert 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.