clickup_set_custom_field_value_by_custom_id

THE RISK

Medium Risk

Why clickup_set_custom_field_value_by_custom_id needs a policy

This tool modifies task metadata (custom field values) reversibly without deleting data or executing arbitrary operations. It falls under Write category. Severity is medium because unauthorized modification of task fields could disrupt workflow tracking and project management, but effects are reversible. Confidence is high because the 'set' verb and explicit modification language clearly indicate data mutation.

From the tool's definition Tool name contains 'set' and description states 'Set a value for a custom field on a task', indicating modification of existing task data.

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

POLICY

How to control clickup_set_custom_field_value_by_custom_id

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 clickup_set_custom_field_value_by_custom_id:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "clickup_set_custom_field_value_by_custom_id": {
      "limits": [
        {
          "counter": "clickup_set_custom_field_value_by_custom_id_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

clickup_set_custom_field_value_by_custom_id stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. 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.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More ClickUp MCP Integration tools

Write clickup_create_doc Create a new doc in ClickUp Write clickup_create_page Create a new page in a ClickUp doc Write clickup_create_task Create a new task in ClickUp Write clickup_edit_page Edit a page in a ClickUp doc Write clickup_set_custom_field_value Set a value for a custom field on a task Write clickup_update_task Update a task by its ID Write clickup_update_task_by_custom_id Update a task by its custom ID Write create_list Create a new list in a folder

All 20 ClickUp MCP Integration tools →

Write tools on other servers

M-Team MCP Server download_torrent YouTube MCP Server generate_video_title Android Forensics ADB MCP Server combine_reports 0xarchive web3_signup

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about clickup_set_custom_field_value_by_custom_id

What does the clickup_set_custom_field_value_by_custom_id tool do? +

Set a value for a custom field on a task using the task. It is categorised as a Write tool in the ClickUp MCP Integration MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on clickup_set_custom_field_value_by_custom_id? +

Register the ClickUp MCP Integration MCP server in PolicyLayer and add a rule for clickup_set_custom_field_value_by_custom_id: 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 clickup_set_custom_field_value_by_custom_id? +

clickup_set_custom_field_value_by_custom_id is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit clickup_set_custom_field_value_by_custom_id? +

Yes. Add a rate_limit block to the clickup_set_custom_field_value_by_custom_id 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 clickup_set_custom_field_value_by_custom_id completely? +

Set action: deny in the PolicyLayer policy for clickup_set_custom_field_value_by_custom_id. 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 clickup_set_custom_field_value_by_custom_id? +

clickup_set_custom_field_value_by_custom_id 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 →