get-custom-fields · ClickUp Operator MCP: Risk & Policy

WHAT IT DOES

What get-custom-fields does on ClickUp Operator

AI agents call get-custom-fields to retrieve information from ClickUp Operator without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

WHY IT NEEDS A POLICY

Why get-custom-fields needs a policy

This tool retrieves metadata about custom fields without modifying, creating, or deleting any data. It is a straightforward query operation that returns information about accessible custom fields. This poses minimal risk as it only exposes existing field definitions.

From the tool's definition The tool name is 'get-custom-fields' and the description states 'Get accessible custom fields in a list'. The verb 'Get' and the read-only nature of retrieving field metadata indicates this is a retrieval operation with no side effects.

Attacks that exploit this kind of access

Questions about get-custom-fields

What does the get-custom-fields tool do? +

Get accessible custom fields in a list. It is categorised as a Read tool in the ClickUp Operator MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get-custom-fields? +

Register the ClickUp Operator MCP server in PolicyLayer and add a rule for get-custom-fields: 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 Operator. Nothing to install.

What risk level is get-custom-fields? +

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

Can I rate-limit get-custom-fields? +

Yes. Add a rate_limit block to the get-custom-fields 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-custom-fields completely? +

Set action: deny in the PolicyLayer policy for get-custom-fields. 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-custom-fields? +

get-custom-fields is provided by the ClickUp Operator MCP server (noah-vh/mcp-server-clickup). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.