AI agents use create_page to create or update resources in Onenote — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Onenote environment.
This tool creates new pages in OneNote sections, which modifies the user's notebook by adding reversible content. This is a Write operation—it introduces new data but does not delete, execute code, or move money. The severity is medium because creating unauthorized pages could clutter a user's workspace or be used to inject misleading information, but the action is reversible (pages can be deleted).
From the tool's definition Tool name 'create_page' and description 'Create a new page in a OneNote section' explicitly indicate creation of new data in OneNote.
Documented attack patterns abuse exactly the kind of access create_page gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Onenote, and nothing reaches the server without passing your rules. This is the rule we recommend for create_page:
{
"version": "1",
"default": "deny",
"tools": {
"create_page": {
"limits": [
{
"counter": "create_page_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_page 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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Create a new page in a OneNote section. It is categorised as a Write tool in the Onenote MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Onenote MCP server in PolicyLayer and add a rule for create_page: 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 Onenote. Nothing to install.
create_page 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 create_page 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 create_page. 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.
create_page is provided by the Onenote MCP server (purpleslurple/onenote-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 12 Onenote tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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12 Onenote tools catalogued and risk-classified — across an index of 42,500+ MCP servers.