bitrix24_update_contact · Bitrix24 MCP Server MCP

WHAT IT DOES

What bitrix24_update_contact does on Bitrix24 MCP Server

AI agents use bitrix24_update_contact to create or update resources in Bitrix24 MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Bitrix24 MCP Server environment.

WHY IT NEEDS A POLICY

Why bitrix24_update_contact needs a policy

This tool modifies existing contact records reversibly. It is a Write operation because it updates data without deleting or destroying records. Severity is medium because unauthorized contact modifications in a CRM could lead to lost business relationships or data confusion, but the impact is limited to a single contact record and is theoretically reversible through additional updates.

From the tool's definition Tool name contains 'update' and description states 'Update an existing contact in Bitrix24 CRM', indicating modification of existing data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

bitrix24_update_contact Rate-limited

bitrix24_update_contact 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": {
    "bitrix24_update_contact": {
      "limits": [
        {
          "counter": "bitrix24_update_contact_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 Bitrix24 MCP Server, so you can run agents against it safely.

FAQ

Questions about bitrix24_update_contact

What does the bitrix24_update_contact tool do? +

Update an existing contact in Bitrix24 CRM. It is categorised as a Write tool in the Bitrix24 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 bitrix24_update_contact? +

Register the Bitrix24 MCP Server MCP server in PolicyLayer and add a rule for bitrix24_update_contact: 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 Bitrix24 MCP Server. Nothing to install.

What risk level is bitrix24_update_contact? +

bitrix24_update_contact is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit bitrix24_update_contact? +

Yes. Add a rate_limit block to the bitrix24_update_contact 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 bitrix24_update_contact completely? +

Set action: deny in the PolicyLayer policy for bitrix24_update_contact. 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 bitrix24_update_contact? +

bitrix24_update_contact is provided by the Bitrix24 MCP Server MCP server (maxli53/mcp_bitrix). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.