AI agents use create_book to create or update resources in InDesign MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your InDesign MCP Server environment.
The tool creates a new book object in InDesign, which is a reversible write operation. It does not execute arbitrary code, delete data irreversibly, or move money. The severity is medium because creating design books could consume resources or overwrite existing books if naming conflicts occur, but the operation remains reversible through standard undo/delete mechanisms.
From the tool's definition Tool name 'create_book' and description 'Create a new InDesign book' indicate creation of a new document/project artifact. This is a write operation that creates data structures in InDesign.
Documented attack patterns abuse exactly the kind of access create_book gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and InDesign MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for create_book:
{
"version": "1",
"default": "deny",
"tools": {
"create_book": {
"limits": [
{
"counter": "create_book_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_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.
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Create a new InDesign book. It is categorised as a Write tool in the InDesign MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the InDesign MCP Server MCP server in PolicyLayer and add a rule for create_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 InDesign MCP Server. Nothing to install.
create_book is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the create_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.
Set action: deny in the PolicyLayer policy for create_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.
create_book is provided by the InDesign MCP Server MCP server (zachshallbetter/indesign-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from InDesign MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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135 InDesign MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.