AI agents invoke print_book to trigger actions in InDesign MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
Printing a book initiates an external operation (sending data to a printer or generating print output), which constitutes executing an external process. It is not purely a read or write operation on document data, and it is not destructive or financial. The blast radius is medium since misuse could waste physical or digital printing resources.
From the tool's definition 'Print a book' — triggers an external print operation
Documented attack patterns abuse exactly the kind of access print_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 print_book:
{
"version": "1",
"default": "deny",
"tools": {
"print_book": {
"limits": [
{
"counter": "print_book_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}print_book stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
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Print a book. It is categorised as a Execute tool in the InDesign MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the InDesign MCP Server MCP server in PolicyLayer and add a rule for print_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.
print_book is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the print_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 print_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.
print_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.