AI agents use set_book_properties to create or update resources in InDesign UXP MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your InDesign UXP MCP Server environment.
The tool modifies book properties (e.g., name, settings, metadata) but does not delete data or execute arbitrary code. Changes to properties are typically reversible by setting them to different values. The blast radius is medium because incorrect property changes could affect document compilation or export behavior, but no data is destroyed and the operation is undoable.
From the tool's definition Tool name 'set_book_properties' and description 'Set various properties for a book' indicate modification of book metadata/configuration. This is a write operation that alters document state reversibly.
Documented attack patterns abuse exactly the kind of access set_book_properties 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 set_book_properties:
{
"version": "1",
"default": "deny",
"tools": {
"set_book_properties": {
"limits": [
{
"counter": "set_book_properties_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}set_book_properties 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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Set various properties for a book. It is categorised as a Write tool in the InDesign UXP MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the InDesign UXP MCP Server MCP server in PolicyLayer and add a rule for set_book_properties: 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.
set_book_properties 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 set_book_properties 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 set_book_properties. 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.
set_book_properties 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.