create_shelf

Create a new shelf 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/create-shelf.md

WHAT IT DOES

What create_shelf does on BookStack MCP Server

AI agents use create_shelf 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 create_shelf is rated Medium

This tool creates a new shelf (a reversible organizational structure) without deleting, modifying existing data, or executing arbitrary code. While shelves are part of BookStack's hierarchy, creating a new shelf is a standard write operation with limited blast radius. A misused AI could create many shelves, causing organizational clutter, but this is easily reversible.

From the tool's definition Tool name 'create_shelf' and description 'Create a new shelf in BookStack' indicate a creation operation that adds a new organizational container to the knowledge base.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_shelf 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 create_shelf, this is the rule to start with:

create_shelf Rate-limited

create_shelf 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_shelf": {
      "limits": [
        {
          "counter": "create_shelf_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 create_shelf call is checked against it from then on.

FAQ

Questions about create_shelf

What does the create_shelf tool do? +

Create a new shelf 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 create_shelf? +

Register the BookStack MCP Server MCP server in PolicyLayer and add a rule for create_shelf: 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 create_shelf? +

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

Can I rate-limit create_shelf? +

Yes. Add a rate_limit block to the create_shelf 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_shelf completely? +

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

create_shelf 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.

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