AI agents use set_page_margins to create or update resources in Doc Tools — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Doc Tools environment.
This tool modifies document metadata (margins) reversibly without deleting data or executing arbitrary code. It fits the Write category—the change can be undone or overwritten. Severity is low because margin changes have minimal business impact and are easily reversible. Confidence is slightly reduced (0.85 vs.
From the tool's definition Tool name 'set_page_margins' indicates modification of document formatting properties. Server context shows 'Word document reading and writing MCP' with sibling tools like 'add_paragraph', 'add_table', 'create_document' that perform reversible document…
Documented attack patterns abuse exactly the kind of access set_page_margins gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Doc Tools, and nothing reaches the server without passing your rules. This is the rule we recommend for set_page_margins:
{
"version": "1",
"default": "deny",
"tools": {
"set_page_margins": {
"limits": [
{
"counter": "set_page_margins_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}set_page_margins 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_page_margins. It is categorised as a Write tool in the Doc Tools MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Doc Tools MCP server in PolicyLayer and add a rule for set_page_margins: 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 Doc Tools. Nothing to install.
set_page_margins 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_page_margins 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_page_margins. 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_page_margins is provided by the Doc Tools MCP server (puchunjie/doc-tools-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Doc Tools, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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7 Doc Tools tools catalogued and risk-classified — across an index of 43,000+ MCP servers.