get_list_assignees

THE RISK

Low Risk

Why get_list_assignees needs a policy

This tool retrieves information about list members without modifying, creating, or deleting any data. It has no side effects and presents minimal risk if misused by an AI agent, as it only exposes organizational structure information that is typically accessible within a workspace. Low severity due to limited blast radius – the worst outcome would be information disclosure of already-accessible team member data.

From the tool's definition The tool description explicitly states 'Get all members (potential assignees) of a list' – a retrieval operation with no side effects. The verb 'Get' and the lack of any mention of modification, deletion, or execution confirms read-only behavior.

Documented attack patterns abuse exactly the kind of access get_list_assignees gives an agent:

POLICY

How to control get_list_assignees

PolicyLayer is an MCP gateway — it sits between your AI agents and ClickUp MCP Integration, and nothing reaches the server without passing your rules. This is the rule we recommend for get_list_assignees:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_list_assignees": {}
  }
}

get_list_assignees is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register ClickUp MCP Integration — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
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Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_list_assignees

What does the get_list_assignees tool do? +

Get all members (potential assignees) of a list. It is categorised as a Read tool in the ClickUp MCP Integration MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_list_assignees? +

Register the ClickUp MCP Integration MCP server in PolicyLayer and add a rule for get_list_assignees: 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 ClickUp MCP Integration. Nothing to install.

What risk level is get_list_assignees? +

get_list_assignees is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_list_assignees? +

Yes. Add a rate_limit block to the get_list_assignees 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.

How do I block get_list_assignees completely? +

Set action: deny in the PolicyLayer policy for get_list_assignees. 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.

What MCP server provides get_list_assignees? +

get_list_assignees is provided by the ClickUp MCP Integration MCP server (leanware-io/clickup-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every ClickUp MCP Integration tool call.

Start from ClickUp MCP Integration, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →