download_and_upload · Kiln MCP: Risk & Policy

WHAT IT DOES

What download_and_upload does on Kiln

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

WHY IT NEEDS A POLICY

Why download_and_upload needs a policy

The name implies a two-phase operation: downloading content (Read) and then uploading it (Write) to a destination. In the context of 3D printer control, this likely involves transferring print files to a printer, which is a Write operation. However, the description is empty, so confidence is reduced.

From the tool's definition Tool name 'download_and_upload' suggests fetching data from one location and writing it to another (e.g., downloading a file and uploading it to a printer or service).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

download_and_upload Rate-limited

download_and_upload 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": {
    "download_and_upload": {
      "limits": [
        {
          "counter": "download_and_upload_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 Kiln, so you can run agents against it safely.

FAQ

Questions about download_and_upload

What does the download_and_upload tool do? +

download_and_upload. It is categorised as a Write tool in the Kiln MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on download_and_upload? +

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

What risk level is download_and_upload? +

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

Can I rate-limit download_and_upload? +

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

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

download_and_upload is provided by the Kiln MCP server (codeofaxel/Kiln). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.