export_backtest_report_html · Nubra MCP Server MCP

WHAT IT DOES

What export_backtest_report_html does on Nubra MCP Server

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

WHY IT NEEDS A POLICY

Why export_backtest_report_html needs a policy

This tool performs a file creation/write operation by generating and exporting an HTML file. While the file itself is not destructive or financially sensitive, it does create persistent data on the system. The severity is medium rather than low because uncontrolled file exports could fill disk space, overwrite existing files, or be used to exfiltrate analysis data.

From the tool's definition The tool 'export_backtest_report_html' creates and exports a file to the local system. The description states it will 'Export a backtest report as a local HTML file,' which constitutes creating/writing a new file artifact on the user's system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

export_backtest_report_html Rate-limited

export_backtest_report_html 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_backtest_report_html": {
      "limits": [
        {
          "counter": "export_backtest_report_html_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 Nubra MCP Server, so you can run agents against it safely.

FAQ

Questions about export_backtest_report_html

What does the export_backtest_report_html tool do? +

Export a backtest report as a local HTML file. Required inputs: symbol, timeframe, strategy_type. It is categorised as a Write tool in the Nubra 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_backtest_report_html? +

Register the Nubra MCP Server MCP server in PolicyLayer and add a rule for export_backtest_report_html: 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 Nubra MCP Server. Nothing to install.

What risk level is export_backtest_report_html? +

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

Can I rate-limit export_backtest_report_html? +

Yes. Add a rate_limit block to the export_backtest_report_html 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_backtest_report_html completely? +

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

export_backtest_report_html is provided by the Nubra MCP Server MCP server (socials-zanskar/nubra-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.