export_data · CERN ROOT MCP Server MCP: Risk & Policy

WHAT IT DOES

What export_data does on CERN ROOT MCP Server

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

WHY IT NEEDS A POLICY

Why export_data needs a policy

This tool creates new output files (JSON, CSV, Parquet) containing branch data extracted from ROOT files. This is a reversible write operation—the exported files can be deleted or replaced. It does not execute arbitrary code, delete source data irreversibly, or move money.

From the tool's definition Tool name 'export_data' and description 'Export branch data to JSON, CSV, or Parquet' indicates creation of new data files in different formats from ROOT file contents.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

export_data Rate-limited

export_data 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": {
    "export_data": {
      "limits": [
        {
          "counter": "export_data_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 CERN ROOT MCP Server, so you can run agents against it safely.

FAQ

Questions about export_data

What does the export_data tool do? +

Export branch data to JSON, CSV, or Parquet. It is categorised as a Write tool in the CERN ROOT 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 export_data? +

Register the CERN ROOT MCP Server MCP server in PolicyLayer and add a rule for export_data: 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 CERN ROOT MCP Server. Nothing to install.

What risk level is export_data? +

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

Can I rate-limit export_data? +

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

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

export_data is provided by the CERN ROOT MCP Server MCP server (mohamedelashri/root-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.