# delete_contact_custom_field_value

Remove the value of a custom field for a specific contact

Agent View of the PolicyLayer registry record for `delete_contact_custom_field_value`. HTML page: https://policylayer.com/tools/instantkom-mcp-server/delete-contact-custom-field-value

## Facts

- Tool: `delete_contact_custom_field_value`
- Server: instantKOM MCP Server (`instantkom/mcp-server`) — https://policylayer.com/tools/instantkom-mcp-server.md
- Homepage: https://github.com/instantKOM/mcp-server
- Risk category: Destructive (Critical risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Hidden

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "delete_contact_custom_field_value",
    "arguments": {}
  }
}
```

## Why delete_contact_custom_field_value is rated Critical

This tool performs an irreversible deletion of a custom field value tied to a contact. While scoped to a single field value (not a full contact deletion), it permanently removes data that cannot be recovered without external backup or restoration. This fits the Destructive category as defined—actions that cannot be undone.

From the tool's own definition: "Tool name contains 'delete' and description states 'Remove the value of a custom field for a specific contact'. The action irreversibly removes data associated with a contact record."

## Use case

AI agents call delete_contact_custom_field_value 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.

## Recommended policy (PolicyLayer)

Verdict: **Hidden**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches instantKOM MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "hide": [
    "delete_contact_custom_field_value"
  ]
}
```

## Other tools on instantKOM MCP Server (244)

- `bulk_delete_custom_fields` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/bulk-delete-custom-fields.md
- `delete_account` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-account.md
- `delete_api_key` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-api-key.md
- `delete_bot` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-bot.md
- `delete_bot_env_var` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-bot-env-var.md
- `delete_bot_env_var_value` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-bot-env-var-value.md
- `delete_bot_filter` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-bot-filter.md
- `delete_broadcast` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-broadcast.md
- `delete_broadcast_media` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-broadcast-media.md
- `delete_chat` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-chat.md
- `delete_contact` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-contact.md
- `delete_custom_field` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-custom-field.md
- `delete_export` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-export.md
- `delete_feed` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-feed.md
- `delete_flow` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-flow.md
- `delete_flow_edge` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-flow-edge.md
- `delete_flow_node` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-flow-node.md
- `delete_message` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-message.md
- `delete_message_media` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-message-media.md
- `delete_object_folder` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-object-folder.md
- `delete_poll` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-poll.md
- `delete_poll_option` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-poll-option.md
- `delete_qr_code` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-qr-code.md
- `delete_segmentation` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-segmentation.md
- `delete_short_link` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-short-link.md
- `delete_super_widget` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-super-widget.md
- `delete_tag` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-tag.md
- `delete_team_member_by_id` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-team-member-by-id.md
- `delete_template` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-template.md
- `delete_ticket` — Destructive — https://policylayer.com/tools/instantkom-mcp-server/delete-ticket.md
- …and 214 more: https://policylayer.com/tools/instantkom-mcp-server.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=instantkom-mcp-server · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/instantkom-mcp-server