mkdirs · Nutstore MCP: Risk & Policy

WHAT IT DOES

What mkdirs does on Nutstore

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

WHY IT NEEDS A POLICY

Why mkdirs needs a policy

This tool creates directories in Nutstore cloud storage. Directory creation is a reversible write operation with low blast radius — directories can be deleted afterward, and no data is overwritten or destroyed.

From the tool's definition 递归创建多级目录 (recursively create multi-level directories)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mkdirs Rate-limited

mkdirs 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": {
    "mkdirs": {
      "limits": [
        {
          "counter": "mkdirs_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 Nutstore, so you can run agents against it safely.

FAQ

Questions about mkdirs

What does the mkdirs tool do? +

在坚果云中递归创建多级目录. It is categorised as a Write tool in the Nutstore MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on mkdirs? +

Register the Nutstore MCP server in PolicyLayer and add a rule for mkdirs: 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 Nutstore. Nothing to install.

What risk level is mkdirs? +

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

Can I rate-limit mkdirs? +

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

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

mkdirs is provided by the Nutstore MCP server (silverze/nutstore-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.