export_portfolio_report_image · Nubra MCP Server MCP

WHAT IT DOES

What export_portfolio_report_image does on Nubra MCP Server

AI agents use export_portfolio_report_image 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_portfolio_report_image needs a policy

This tool creates and writes a new file (PNG image) to the local filesystem as a side effect. While the generation itself is read-only (querying portfolio data), the persistent write of the file artifact elevates it to Write category.

From the tool's definition Tool description states it will 'Generate a visual portfolio dashboard, save it as a local PNG file, and return file metadata'. The act of saving a PNG file to the local filesystem is a write operation that creates new data/artifacts.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

export_portfolio_report_image Rate-limited

export_portfolio_report_image 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_portfolio_report_image": {
      "limits": [
        {
          "counter": "export_portfolio_report_image_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_portfolio_report_image

What does the export_portfolio_report_image tool do? +

Generate a visual portfolio dashboard, save it as a local PNG file, and return file metadata for a fast clickable link in chat. No input arguments are required. 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_portfolio_report_image? +

Register the Nubra MCP Server MCP server in PolicyLayer and add a rule for export_portfolio_report_image: 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_portfolio_report_image? +

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

Can I rate-limit export_portfolio_report_image? +

Yes. Add a rate_limit block to the export_portfolio_report_image 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_portfolio_report_image completely? +

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

export_portfolio_report_image 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.