AI agents use resize_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.
Resizing a page item is a modification operation that alters the dimensions of a design element. This is clearly a Write operation because it changes document state (object dimensions) in a reversible manner. It is not Destructive because the change can be undone and no data is deleted.
From the tool's definition Tool name is 'resize_page_item' and description states 'Resize a page item'. Resizing modifies visual properties of a design object within InDesign, which is a reversible change to document content.
Documented attack patterns abuse exactly the kind of access resize_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 resize_page_item:
{
"version": "1",
"default": "deny",
"tools": {
"resize_page_item": {
"limits": [
{
"counter": "resize_page_item_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}resize_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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Resize 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 resize_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.
resize_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 resize_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 resize_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.
resize_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.
Free to start. No card required.
135 InDesign UXP MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.