Deletes an existing inbox rule
AI agents call delete-rule to permanently remove resources in Outlook Assistant — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool performs an irreversible deletion of inbox rules, which cannot be undone without manual recreation. Inbox rules control email filtering and organization, and their deletion could disrupt a user's email management workflow. The severity is high rather than critical because the impact is scoped to email rules rather than email messages themselves or financial data, but it remains destructive in nature.
From the tool's definition The tool description explicitly states it 'Deletes an existing inbox rule'. The verb 'Deletes' combined with 'existing' indicates irreversible removal of data.
Attacks that exploit this kind of access
Deletes an existing inbox rule. It is categorised as a Destructive tool in the Outlook Assistant MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Outlook Assistant MCP server in PolicyLayer and add a rule for delete-rule: 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 Assistant. Nothing to install.
delete-rule 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-rule 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-rule. 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-rule is provided by the Outlook Assistant MCP server (titanzero/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.
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