AI agents use create_contact to create or update resources in Twenty MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Twenty MCP Server environment.
This tool creates new records in the CRM, which is a reversible write operation. It does not delete data (Destructive), move money (Financial), or execute arbitrary code (Execute). The blast radius is medium because creating unauthorized or incorrect contacts could pollute the CRM database and require manual cleanup, but the impact is containable through standard CRM record deletion.
From the tool's definition Tool name is 'create_contact' and description states 'Create a new contact (person) in Twenty CRM' — explicitly creates and adds new data to the CRM system.
Documented attack patterns abuse exactly the kind of access create_contact gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Twenty MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for create_contact:
{
"version": "1",
"default": "deny",
"tools": {
"create_contact": {
"limits": [
{
"counter": "create_contact_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_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.
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Create a new contact (person) in Twenty CRM. It is categorised as a Write tool in the Twenty MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Twenty MCP Server MCP server in PolicyLayer and add a rule for create_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 Twenty MCP Server. Nothing to install.
create_contact 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 create_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.
Set action: deny in the PolicyLayer policy for create_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.
create_contact is provided by the Twenty MCP Server MCP server (jezweb/twenty-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Twenty 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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29 Twenty MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.