Complete the authentication process after user enters device code.
AI agents use complete_authentication 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.
An AI agent can call complete_authentication faster than any human can review — one bad instruction and it creates or modifies resources in Onenote by the hundred, each call as confident as the last.
Documented attack patterns abuse exactly the kind of access complete_authentication 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 complete_authentication:
{
"version": "1",
"default": "deny",
"tools": {
"complete_authentication": {
"limits": [
{
"counter": "complete_authentication_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}complete_authentication 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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Complete the authentication process after user enters device code. 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 complete_authentication: 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.
complete_authentication 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 complete_authentication 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 complete_authentication. 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.
complete_authentication 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.