publish_book · Lightpaper MCP: Risk & Policy

WHAT IT DOES

What publish_book does on Lightpaper Mcp

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

WHY IT NEEDS A POLICY

Why publish_book needs a policy

Publishing content to a permanent web platform is a reversible write operation—documents can be unpublished or modified later (corroborated by sibling tool 'delete_lightpaper'). It does not execute arbitrary code, delete irreversibly, or commit financial transactions.

From the tool's definition Tool name 'publish_book' and description 'Publish a multi-chapter book to lightpaper.org. Each chapter becomes a document with' indicate the tool creates and publishes content to a permanent web platform.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

publish_book Rate-limited

publish_book 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": {
    "publish_book": {
      "limits": [
        {
          "counter": "publish_book_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 Lightpaper Mcp, so you can run agents against it safely.

FAQ

Questions about publish_book

What does the publish_book tool do? +

Publish a multi-chapter book to lightpaper.org. Each chapter becomes a document with. It is categorised as a Write tool in the Lightpaper Mcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on publish_book? +

Register the Lightpaper MCP server in PolicyLayer and add a rule for publish_book: 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 Lightpaper Mcp. Nothing to install.

What risk level is publish_book? +

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

Can I rate-limit publish_book? +

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

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

publish_book is provided by the Lightpaper MCP server (pypi:lightpaper-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.