AI agents use duplicate_page_item 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.
This tool creates or modifies document state by producing a new page item clone. It is reversible (undo/delete capability), so it does not qualify as Destructive. It does not execute arbitrary code or external operations (Execute), nor does it permanently remove data. It is a Write operation—creating new design content within the document that can be reversed or modified later.
From the tool's definition duplicate_page_item: duplicates a page item within an InDesign document. This creates new content (a copy of an existing page item) reversibly—the duplicated item can be deleted or undone.
Documented attack patterns abuse exactly the kind of access duplicate_page_item 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 duplicate_page_item:
{
"version": "1",
"default": "deny",
"tools": {
"duplicate_page_item": {
"limits": [
{
"counter": "duplicate_page_item_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}duplicate_page_item 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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Duplicate a page item. 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 duplicate_page_item: 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.
duplicate_page_item 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 duplicate_page_item 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 duplicate_page_item. 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.
duplicate_page_item 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.