AI agents call list-tasks to retrieve information from Microsoft Planner MCP 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 task data from a Microsoft Planner plan without creating, modifying, or deleting any resources. It has no side effects and presents minimal risk even if misused by an AI agent, as it only exposes existing task information that the authenticated user already has permission to access.
From the tool's definition Tool name is 'list-tasks' and description states 'List all tasks in a Planner plan' — a retrieval operation with no data modification.
Documented attack patterns abuse exactly the kind of access list-tasks gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Microsoft Planner MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for list-tasks:
{
"version": "1",
"default": "deny",
"tools": {
"list-tasks": {}
}
}list-tasks is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all tasks in a Planner plan. It is categorised as a Read tool in the Microsoft Planner MCP MCP Server, which means it retrieves data without modifying state.
Register the Microsoft Planner MCP server in PolicyLayer and add a rule for list-tasks: 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 Microsoft Planner MCP. Nothing to install.
list-tasks 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-tasks 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-tasks. 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-tasks is provided by the Microsoft Planner MCP server (vyente-ruffin/microsoft-planner-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Microsoft Planner MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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9 Microsoft Planner MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.