xbrl_export_json · Arelle MCP: Risk & Policy

WHAT IT DOES

What xbrl_export_json does on Arelle

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

WHY IT NEEDS A POLICY

Why xbrl_export_json needs a policy

Export tools generate new data outputs (JSON serialization of XBRL content) which constitutes a Write operation. While the description is empty, the naming pattern and server context (financial filing analysis) suggest this extracts and formats XBRL data into JSON format—a reversible data transformation/creation.

From the tool's definition Tool name 'xbrl_export_json' indicates data export/serialization functionality. In the context of XBRL filing operations (per server description), export typically creates or writes output files/data without irreversibly deleting originals.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

xbrl_export_json Rate-limited

xbrl_export_json 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": {
    "xbrl_export_json": {
      "limits": [
        {
          "counter": "xbrl_export_json_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 Arelle, so you can run agents against it safely.

FAQ

Questions about xbrl_export_json

What does the xbrl_export_json tool do? +

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

How do I enforce a policy on xbrl_export_json? +

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

What risk level is xbrl_export_json? +

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

Can I rate-limit xbrl_export_json? +

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

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

xbrl_export_json is provided by the Arelle MCP server (thekinghippopotamus/arelle-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.