Assign roles to a user by creating a grant. Validates that the roles exist in the project before granting.
AI agents use zitadel_create_user_grant to create or update resources in Zitadel MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Zitadel MCP environment.
This tool creates role grants for users, which is a data modification operation. While reversible (grants can be revoked), it has high severity because granting roles directly impacts access control and security posture. An AI agent misusing this could elevate user privileges, grant unauthorized access, or create privilege escalation paths.
From the tool's definition Tool name and description: 'Assign roles to a user by creating a grant' - this creates/adds role assignments to users, modifying authorization state. The description confirms it 'creates a grant' which is a reversible change to user permissions.
Documented attack patterns abuse exactly the kind of access zitadel_create_user_grant gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Zitadel MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for zitadel_create_user_grant:
{
"version": "1",
"default": "deny",
"tools": {
"zitadel_create_user_grant": {
"limits": [
{
"counter": "zitadel_create_user_grant_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}zitadel_create_user_grant 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.
Free to start. No card required.
Assign roles to a user by creating a grant. Validates that the roles exist in the project before granting. It is categorised as a Write tool in the Zitadel MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Zitadel MCP server in PolicyLayer and add a rule for zitadel_create_user_grant: 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 Zitadel MCP. Nothing to install.
zitadel_create_user_grant 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 zitadel_create_user_grant 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 zitadel_create_user_grant. 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.
zitadel_create_user_grant is provided by the Zitadel MCP server (takleb3rry/zitadel-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Zitadel MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
26 Zitadel MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.