bitrix_list_field_add · Email MCP Server MCP: Risk & Policy

WHAT IT DOES

What bitrix_list_field_add does on Email MCP Server

AI agents use bitrix_list_field_add to create or update resources in Email MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Email MCP Server environment.

WHY IT NEEDS A POLICY

Why bitrix_list_field_add needs a policy

This tool creates a new field in a Bitrix24 list, which is a Write operation. It modifies the data structure but is generally reversible (the field can be deleted). Severity is medium because adding unexpected fields to a list could affect integrations or data integrity, but it doesn't delete or overwrite existing data.

From the tool's definition 'Add a new field to a Bitrix24 list' — creates a new field (schema modification), which is a reversible write operation

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

bitrix_list_field_add Rate-limited

bitrix_list_field_add 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.

View as policy code

policy.json

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

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Email MCP Server, so you can run agents against it safely.

FAQ

Questions about bitrix_list_field_add

What does the bitrix_list_field_add tool do? +

Add a new field to a Bitrix24 list. It is categorised as a Write tool in the Email MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on bitrix_list_field_add? +

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

What risk level is bitrix_list_field_add? +

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

Can I rate-limit bitrix_list_field_add? +

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

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

bitrix_list_field_add is provided by the Email MCP Server MCP server (sventern/mcp_email). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.