sam_init

THE RISK

Low Risk

Why sam_init needs a policy

Without a description, classification is uncertain. 'sam_init' most likely initializes/creates a new SAM project structure (a Write or Execute action), but could also just be a read/template operation. Given the ambiguity and empty description, confidence is low. If it scaffolds project files, it would be Write; if it runs CLI commands, Execute. Defaulting to Other with low confidence due to insufficient evidence.

From the tool's definition Tool name 'sam_init' and empty description provide minimal information. 'sam_init' likely refers to AWS SAM (Serverless Application Model) CLI initialization, which scaffolds a new serverless project.

Documented attack patterns abuse exactly the kind of access sam_init gives an agent:

POLICY

How to control sam_init

PolicyLayer is an MCP gateway — it sits between your AI agents and Prometheus MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for sam_init:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "sam_init": {
      "limits": [
        {
          "counter": "sam_init_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

sam_init gets a rate cap, and everything else on the server is denied unless you say otherwise.

Create a free account and register Prometheus MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

SET A RULE FOR THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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All 805 Prometheus MCP Server tools →

Other tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Tool risk categories → How PolicyLayer classifies MCP tools by what they can do.
MCP tool → What an MCP tool is and how clients discover and call it.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about sam_init

What does the sam_init tool do? +

sam_init. It is categorised as a Other tool in the Prometheus MCP Server MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on sam_init? +

Register the Prometheus MCP Server 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 Prometheus MCP Server. Nothing to install.

What risk level is sam_init? +

sam_init is a Other tool with low risk. Read-only tools are generally safe to allow by default.

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 Prometheus MCP Server MCP server (awslabs.prometheus-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Prometheus MCP Server tool call.

Start from Prometheus MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →