🔴 Delete a OneDrive file or folder permanently (always require user confirmation)
AI agents call file_delete 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.
This tool permanently deletes files or folders from OneDrive without recovery. Deletion is irreversible and represents data loss. Even with the safeguard of requiring user confirmation, misuse by an AI agent could result in catastrophic data loss. This is the most severe action category (Destructive > Execute > Write > Read).
From the tool's definition Tool name is 'file_delete' with description: 'Delete a OneDrive file or folder permanently (always require user confirmation)'. The word 'permanently' and 'delete' unambiguously indicate irreversible destruction of data.
Attacks that exploit this kind of access
🔴 Delete a OneDrive file or folder permanently (always require user confirmation). 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 file_delete: 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.
file_delete 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 file_delete 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 file_delete. 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.
file_delete 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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