update_book

Update an existing book in BookStack.

SERVERBookStack MCP Server SOURCEderron-knox/bookstack-mcp-server

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/derron-knox-bookstack-mcp-server/update-book.md

WHAT IT DOES

What update_book does on BookStack MCP Server

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

RISK

Why update_book is rated Medium

The update_book tool creates or modifies data in a reversible manner. While it changes state, updates are typically undoable (via version history or reverting to previous content), distinguishing it from destructive operations. The blast radius is medium because unauthorized updates could corrupt or obscure knowledge base content, but the damage is recoverable and localized to a single book resource.

From the tool's definition Tool description states 'Update an existing book in BookStack' — this modifies existing data reversibly without deleting it.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs update_book safely

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

update_book Rate-limited

update_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": {
    "update_book": {
      "limits": [
        {
          "counter": "update_book_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 BookStack MCP Server, apply this rule, and every update_book call is checked against it from then on.

FAQ

Questions about update_book

What does the update_book tool do? +

Update an existing book in BookStack. It is categorised as a Write tool in the BookStack 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 update_book? +

Register the BookStack MCP Server MCP server in PolicyLayer and add a rule for update_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 BookStack MCP Server. Nothing to install.

What risk level is update_book? +

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

Can I rate-limit update_book? +

Yes. Add a rate_limit block to the update_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 update_book completely? +

Set action: deny in the PolicyLayer policy for update_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 update_book? +

update_book is provided by the BookStack MCP Server MCP server (derron-knox/bookstack-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on BookStack MCP Server, and thousands of servers like it.

This server

All 24 BookStack MCP Server tools →

Across the catalogue

aroflo_create_or_update_record on AroFlo MCP →team_manager_update_budget on Team Manager MCP → The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →