AI agents call folder_get 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.
The 'get' operation pattern indicates a read action that retrieves folder information without modification. However, confidence is moderate (0.75) rather than high because the description is empty, creating ambiguity about exact scope (e.g., whether it retrieves sensitive email folder contents or just metadata).
From the tool's definition Tool name 'folder_get' with 'get' verb suggests data retrieval. Server context involves Microsoft 365 services (Outlook, OneDrive) where folder operations typically retrieve folder metadata or contents.
Attacks that exploit this kind of access
folder_get. 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 folder_get: 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.
folder_get 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 folder_get 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 folder_get. 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.
folder_get is provided by the M365 MCP server (robin-collins/m365-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
folder_get is one line of M365's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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