AI agents call od_recent to retrieve information from M365 without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries file metadata from OneDrive without side effects. It does not create, modify, delete, execute, or move data. The operation is read-only and returns information about recently accessed files. Severity is low because the blast radius of misuse is limited to information disclosure of file names and access history that the authenticated user already has access to.
From the tool's definition Tool name 'od_recent' and description 'List recently accessed files in your personal OneDrive' indicates retrieval of metadata about recently accessed files without modification, deletion, or execution of code.
Attacks that exploit this kind of access
List recently accessed files in your personal OneDrive. Useful for finding files you worked on recently. It is categorised as a Read tool in the M365 MCP Server, which means it retrieves data without modifying state.
Register the M365 MCP server in PolicyLayer and add a rule for od_recent: 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 M365. Nothing to install.
od_recent 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 od_recent 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 od_recent. 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.
od_recent is provided by the M365 MCP server (swamirama/m365-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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