AI agents invoke print_book to trigger actions in InDesign UXP 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 initiates a real-world external operation (sending a job to a printer or print service). It is not merely reading or writing data within InDesign, nor is it destructive or financial. It falls under Execute because it triggers an external operation whose effects (paper, ink, print queue consumption) depend on the arguments and cannot be trivially undone.
From the tool's definition Print a book — triggers an external physical printing 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 UXP 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 UXP MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the InDesign UXP 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 UXP 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 UXP MCP Server MCP server (theloniuser/indesign-uxp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 135 InDesign UXP MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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135 InDesign UXP MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.