create_sample_file · Simple MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_sample_file does on Simple MCP Server

AI agents use create_sample_file to create or update resources in Simple MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Simple MCP Server environment.

WHY IT NEEDS A POLICY

Why create_sample_file needs a policy

This tool creates new files, which is a reversible write operation. It does not delete data (not Destructive), does not execute arbitrary code (not Execute), and appears to be a testing utility constrained to safe directories. The 'sample' qualifier and test-oriented purpose further indicate low risk compared to general file write capabilities.

From the tool's definition Tool name 'create_sample_file' and description 'create sample file (for testing)' indicate file creation. The context shows it's a file operations server with security restrictions to 'safe directories only', suggesting limited scope.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_sample_file Rate-limited

create_sample_file 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": {
    "create_sample_file": {
      "limits": [
        {
          "counter": "create_sample_file_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 Simple MCP Server, so you can run agents against it safely.

FAQ

Questions about create_sample_file

What does the create_sample_file tool do? +

サンプルファイルを作成します（テスト用）. It is categorised as a Write tool in the Simple MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_sample_file? +

Register the Simple MCP Server MCP server in PolicyLayer and add a rule for create_sample_file: 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 Simple MCP Server. Nothing to install.

What risk level is create_sample_file? +

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

Can I rate-limit create_sample_file? +

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

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

create_sample_file is provided by the Simple MCP Server MCP server (p-united/mcpsample). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.