AI agents use resize_page_item to create or update resources in InDesign MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your InDesign MCP Server environment.
Resizing page items modifies document content but is reversible—the original dimensions can be restored. This fits the Write category (creates or modifies data reversibly). Severity is medium because misuse could corrupt a document's layout or make it unusable, but the operation itself is not destructive or irreversible.
From the tool's definition Tool name 'resize_page_item' and description 'Resize a page item' indicate modification of existing design objects. This is a reversible operation that alters object properties within a document without deleting data or executing arbitrary code.
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 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 MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the InDesign 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 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 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.