upload_to_huggingface · Synphony MCP: Risk & Policy

WHAT IT DOES

What upload_to_huggingface does on Synphony MCP

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

WHY IT NEEDS A POLICY

Why upload_to_huggingface needs a policy

This tool uploads video datasets to Hugging Face Hub, creating or modifying remote repository data. While uploads are reversible (unlike destructive deletions), they commit data to external platforms and can have significant consequences if misapplied by an agent (e.g., uploading sensitive data, overwriting important datasets, or unauthorized publication).

From the tool's definition Tool name 'upload_to_huggingface' combined with server description stating 'direct upload capabilities to Hugging Face Hub repositories' and 'batch uploads' indicates creation/modification of data on external repositories.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

upload_to_huggingface Rate-limited

upload_to_huggingface 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": {
    "upload_to_huggingface": {
      "limits": [
        {
          "counter": "upload_to_huggingface_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 Synphony MCP, so you can run agents against it safely.

FAQ

Questions about upload_to_huggingface

What does the upload_to_huggingface tool do? +

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

How do I enforce a policy on upload_to_huggingface? +

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

What risk level is upload_to_huggingface? +

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

Can I rate-limit upload_to_huggingface? +

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

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

upload_to_huggingface is provided by the Synphony MCP server (rukasuamarike/synphony-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.