delete_custom_field

Delete a custom field definition and all its values across all contacts

SERVERinstantKOM MCP Server SOURCEinstantkom/mcp-server

Critical RISK CLASS

Category Destructive

Parameters 00 required

Recommended Hiddensee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/instantkom-mcp-server/delete-custom-field.md

WHAT IT DOES

What delete_custom_field does on instantKOM MCP Server

AI agents call delete_custom_field to permanently remove resources in instantKOM MCP Server, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

RISK

Why delete_custom_field is rated Critical

This tool permanently removes a custom field definition and all associated values for all contacts in the system. This is an irreversible destructive action affecting potentially thousands of records. While not a financial transaction, the blast radius is significant if triggered unintentionally (e.g., deleting customer demographics or critical metadata).

From the tool's definition 'Delete a custom field definition and all its values across all contacts' — explicitly deletes data irreversibly across potentially many records

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs delete_custom_field safely

PolicyLayer is an MCP gateway: it sits between your AI agents and instantKOM MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For delete_custom_field, this is the rule to start with:

delete_custom_field Hidden

delete_custom_field is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "delete_custom_field"
  ]
}

RESTRICT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect instantKOM MCP Server, apply this rule, and every delete_custom_field call is checked against it from then on.

FAQ

Questions about delete_custom_field

What does the delete_custom_field tool do? +

Delete a custom field definition and all its values across all contacts. It is categorised as a Destructive tool in the instantKOM MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on delete_custom_field? +

Register the instantKOM MCP Server MCP server in PolicyLayer and add a rule for delete_custom_field: 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 instantKOM MCP Server. Nothing to install.

What risk level is delete_custom_field? +

delete_custom_field is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit delete_custom_field? +

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

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

delete_custom_field is provided by the instantKOM MCP Server MCP server (instantkom/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on instantKOM MCP Server, and thousands of servers like it.

This server

All 245 instantKOM MCP Server tools → Critical-risk tools on this server →

Across the catalogue

sms_delete_message on Twilio SMS MCP Server →delete_snapshot on Why Did You Render →calendar_delete_event on Templonix Lite MCP Server →delete_addon_domain on cPanel MCP Server → All critical-risk MCP tools → The MCP Attack Database →

Guides

Govern database agents →Blast radius →Tool call approval →