AI agents call list_todo_lists to retrieve information from Todo without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns existing task lists without creating, modifying, deleting, or executing any operations. It is a pure read operation with minimal blast radius if misused by an AI agent—at worst, it reveals the structure of a user's task organization.
From the tool's definition Tool name 'list_todo_lists' and description 'List all Microsoft To Do task lists' indicate a retrieval operation with no modification or deletion of data.
Attacks that exploit this kind of access
List all Microsoft To Do task lists. It is categorised as a Read tool in the Todo MCP Server, which means it retrieves data without modifying state.
Register the Todo MCP server in PolicyLayer and add a rule for list_todo_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 Todo. Nothing to install.
list_todo_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_todo_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_todo_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_todo_lists is provided by the Todo MCP server (jc1122/todo-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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