AI agents use create_user to create or update resources in MCP Server for Coroot — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP Server for Coroot environment.
This tool creates a new user account, which is a reversible write operation. While it modifies system state by adding a user, it does not delete or irreversibly destroy data (Destructive), execute arbitrary code (Execute), involve financial transactions (Financial), or require elevated risk like the admin-only create_api_key sibling tool.
From the tool's definition Tool name is 'create_user' and description states 'Create a new user (admin only)'. This is a creation operation that adds a new account to the system.
Risk signalsAdmin/system-level operation
Documented attack patterns abuse exactly the kind of access create_user gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Server for Coroot, and nothing reaches the server without passing your rules. This is the rule we recommend for create_user:
{
"version": "1",
"default": "deny",
"tools": {
"create_user": {
"limits": [
{
"counter": "create_user_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_user 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 user (admin only). It is categorised as a Write tool in the MCP Server for Coroot MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the MCP Server for Coroot MCP server in PolicyLayer and add a rule for create_user: 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 MCP Server for Coroot. Nothing to install.
create_user 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_user 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_user. 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_user is provided by the MCP Server for Coroot MCP server (jamesbrink/mcp-coroot). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from MCP Server for Coroot, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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61 MCP Server for Coroot tools catalogued and risk-classified — across an index of 43,000+ MCP servers.