Lists all To Do task lists in the mailbox
AI agents call list-task-lists to retrieve information from Outlook MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
list-task-lists retrieves and enumerates task lists from the user's mailbox without creating, modifying, or deleting any data. It has no side effects beyond information disclosure. While task list contents may contain sensitive personal or business information, the read-only nature and low blast radius of accidentally querying this endpoint makes it a low-severity Read operation.
From the tool's definition The tool 'lists all To Do task lists' — this is a retrieval operation with no modification, deletion, or execution of external effects. The verb 'list' is explicitly a read-only query operation.
Attacks that exploit this kind of access
Lists all To Do task lists in the mailbox. It is categorised as a Read tool in the Outlook MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Outlook MCP Server MCP server in PolicyLayer and add a rule for list-task-lists: 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 MCP Server. Nothing to install.
list-task-lists 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-task-lists 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-task-lists. 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-task-lists is provided by the Outlook MCP Server MCP server (peacockery-studio/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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