List all Outlook rules (mail organization rules).
AI agents call list_outlook_rules to retrieve information from MCP Outlook without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and enumerates Outlook rules, which is a read-only operation with no side effects. However, severity is elevated to 'medium' rather than 'low' because mail rules can reveal sensitive organizational policies, automation logic, and filtering patterns that could inform social engineering attacks or help an adversary understand email routing and security controls.
From the tool's definition Tool name 'list_outlook_rules' and description 'List all Outlook rules' indicate a data retrieval operation that queries existing mail organization rules without modification or execution.
Attacks that exploit this kind of access
List all Outlook rules (mail organization rules). It is categorised as a Read tool in the MCP Outlook MCP Server, which means it retrieves data without modifying state.
Register the MCP Outlook MCP server in PolicyLayer and add a rule for list_outlook_rules: 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 MCP Outlook. Nothing to install.
list_outlook_rules 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 list_outlook_rules 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 list_outlook_rules. 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.
list_outlook_rules is provided by the MCP Outlook MCP server (vince1024/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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