create_pdf_from_text · Nexus Core MCP: Risk & Policy

WHAT IT DOES

What create_pdf_from_text does on Nexus Core

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

WHY IT NEEDS A POLICY

Why create_pdf_from_text needs a policy

This tool creates a new document artifact but does not modify existing data, execute code, delete anything, or involve financial transactions. PDF generation is a standard Write operation: it produces new content reversibly. The blast radius is minimal since PDFs are typically standalone documents and formatting mistakes are easily corrected.

From the tool's definition Tool generates and creates a new PDF document from text input with customizable formatting options (font_name, font_size, page_size, margin_pt). The description explicitly states 'Generate a PDF' which is a creation operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_pdf_from_text Rate-limited

create_pdf_from_text 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": {
    "create_pdf_from_text": {
      "limits": [
        {
          "counter": "create_pdf_from_text_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 Nexus Core, so you can run agents against it safely.

FAQ

Questions about create_pdf_from_text

What does the create_pdf_from_text tool do? +

Generate a PDF from text. Options: font_name, font_size, page_size ('letter'|'a4'), margin_pt. It is categorised as a Write tool in the Nexus Core MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_pdf_from_text? +

Register the Nexus Core MCP server in PolicyLayer and add a rule for create_pdf_from_text: 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 Nexus Core. Nothing to install.

What risk level is create_pdf_from_text? +

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

Can I rate-limit create_pdf_from_text? +

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

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

create_pdf_from_text is provided by the Nexus Core MCP server (noumenon-ai/nexus-core). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.