emailfolders_empty
AI agents call emailfolders_empty to permanently remove resources in M365 — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
'Empty' in the context of email folders (e.g., 'Empty Trash' or 'Empty Folder') universally means bulk-deleting all contents irreversibly. This would destroy potentially large amounts of email data with no easy recovery path. The empty description lowers confidence slightly, but the naming convention is unambiguous in the M365/Outlook context.
From the tool's definition Tool name 'emailfolders_empty' strongly implies emptying/purging all emails from a folder, which is irreversible. Description is empty, so classification is based on name alone.
Attacks that exploit this kind of access
emailfolders_empty. It is categorised as a Destructive tool in the M365 MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the M365 MCP server in PolicyLayer and add a rule for emailfolders_empty: 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.
emailfolders_empty is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the emailfolders_empty 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 emailfolders_empty. 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.
emailfolders_empty 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.
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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