Delete a mail message (moves to Deleted Items)
AI agents call delete-mail-message to permanently remove resources in Outlook OAuth MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Although technically the message moves to a Deleted Items folder rather than being permanently purged, from a user perspective this is a destructive action that removes the message from the inbox and normal access. An AI agent with this capability could delete important emails, financial records, or evidence. This is more severe than Write (which is reversible) and constitutes a destructive operation.
From the tool's definition Tool name is 'delete-mail-message' and description states it 'Delete a mail message (moves to Deleted Items)'. This is an irreversible deletion operation that removes user email data.
Attacks that exploit this kind of access
Delete a mail message (moves to Deleted Items). It is categorised as a Destructive tool in the Outlook OAuth MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Outlook OAuth MCP Server MCP server in PolicyLayer and add a rule for delete-mail-message: 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 Outlook OAuth MCP Server. Nothing to install.
delete-mail-message 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 delete-mail-message 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 delete-mail-message. 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.
delete-mail-message is provided by the Outlook OAuth MCP Server MCP server (leonine-studios/useful-outlook-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.
Teams ship this data inside their own products. See what a licence covers →