Check current authentication status and token validity.
AI agents call check_authentication to retrieve information from Onenote without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a read-only operation that queries the current authentication state without side effects. It retrieves information about token validity but does not create, modify, delete, or execute any actions. Confidence is high because the description is clear and unambiguous.
From the tool's definition Tool checks authentication status and token validity—no modification, deletion, or execution of external operations. Pure inspection of state.
Documented attack patterns abuse exactly the kind of access check_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 check_authentication:
{
"version": "1",
"default": "deny",
"tools": {
"check_authentication": {}
}
}check_authentication is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Check current authentication status and token validity. It is categorised as a Read tool in the Onenote MCP Server, which means it retrieves data without modifying state.
Register the Onenote MCP server in PolicyLayer and add a rule for check_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.
check_authentication is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the check_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 check_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.
check_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.