sam_init · Awslabs Valkey MCP: Risk & Policy

WHAT IT DOES

What sam_init does on Awslabs Valkey

AI agents invoke sam_init to trigger actions in Awslabs Valkey. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why sam_init needs a policy

The name 'sam_init' strongly implies AWS SAM CLI initialization, which runs code generation and project setup. However, the description is empty, which reduces confidence. SAM init typically executes scaffolding operations that create files and configure infrastructure templates, placing it in the Execute category.

From the tool's definition Tool name 'sam_init' suggests AWS SAM (Serverless Application Model) initialization, which executes project scaffolding and setup operations

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sam_init Rate-limited

sam_init stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "sam_init": {
      "limits": [
        {
          "counter": "sam_init_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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 sam_init

What does the sam_init tool do? +

sam_init. It is categorised as a Execute tool in the Awslabs Valkey MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on sam_init? +

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

sam_init is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit sam_init? +

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

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

sam_init 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.