AI agents use createDeal 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.
The tool creates new data (deals) in a CRM system, which is reversible (deals can be modified or deleted later). This is a Write operation. Severity is high because deal creation can commit business-critical records and workflows, and misuse could generate spurious leads or financial obligations if deals are tied to revenue tracking or contracts.
From the tool's definition Tool name 'createDeal' combined with server description stating it 'enables CRUD operations on entities like deals, leads, contacts, and tasks' indicates this tool creates new deal records in Bitrix24 CRM.
Documented attack patterns abuse exactly the kind of access createDeal gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Bitrix24 MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for createDeal:
{
"version": "1",
"default": "deny",
"tools": {
"createDeal": {
"limits": [
{
"counter": "createdeal_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}createDeal 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.
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createDeal. 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.
Register the Bitrix24 MCP Server MCP server in PolicyLayer and add a rule for createDeal: 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.
createDeal is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the createDeal 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.
Set action: deny in the PolicyLayer policy for createDeal. 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.
createDeal is provided by the Bitrix24 MCP Server MCP server (oneatdrt/bitrix24_mcp_server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Bitrix24 MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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25 Bitrix24 MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.