add_book_chapter

SERVERMoodle SOURCE@falkenslab/moodle-mcp

Medium RISK CLASS

Category Write

Parameters 73 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/falkenslab-moodle-mcp/add-book-chapter.md

WHAT IT DOES

What add_book_chapter does on Moodle

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

Parameter	Type	Required	Description
`embed`	array	—	Absolute local files (images…) to embed in the content, which names each by its file name: <img src="shot.png">
`title`	string	Yes
`bookId`	integer	Yes	The book's id (course module id), as get_course_structure gives it
`hidden`	boolean	—	Hidden from students
`content`	string	Yes	Its content (HTML); Moodle requires some
`subchapter`	boolean	—	A subchapter of the chapter before it (not for the first)
`afterChapterId`	integer	—	The chapter it goes after; at the end without it

Parameters from the server's own tool schema.

RISK

Why add_book_chapter is rated Medium

An AI agent can call add_book_chapter faster than any human can review: one bad instruction and it creates or modifies resources in Moodle by the hundred, each call as confident as the last.

Risk signalsAccepts raw HTML/template content (content)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs add_book_chapter safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Moodle, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For add_book_chapter, this is the rule to start with:

add_book_chapter Rate-limited

add_book_chapter 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": {
    "add_book_chapter": {
      "limits": [
        {
          "counter": "add_book_chapter_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Moodle, apply this rule, and every add_book_chapter call is checked against it from then on.

FAQ

Questions about add_book_chapter

What does the add_book_chapter tool do? +

Add a chapter to a book through Moodle's chapter form: its title and content (HTML, with local images embedded), at the end or after another chapter, as a subchapter of the chapter before it if asked, hidden if asked (shown by default, as Moodle adds it: hide it while the book is visible and the chapter isn't ready). Returns the new chapter's id and the chapters. Changes the course: confirm with the person first. It is categorised as a Write tool in the Moodle MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does add_book_chapter accept? +

add_book_chapter accepts 7 parameters: embed, title, bookId, hidden, content, subchapter, afterChapterId. Required: title, bookId, content. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on add_book_chapter? +

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

What risk level is add_book_chapter? +

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

Can I rate-limit add_book_chapter? +

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

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

add_book_chapter is provided by the Moodle MCP server (@falkenslab/moodle-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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