Assigns a security role to a specific user, granting them all the permissions defined in that role. Use this to provide users with the appropriate access levels for their job functions and responsibilities.
AI agents use assign_role_to_user to create or update resources in Dataverse MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Dataverse MCP Server environment.
This tool creates or modifies authorization state by assigning role-based permissions to users. While not destructive (the assignment is reversible via removal), it is a Write operation that alters security posture and access control.
From the tool's definition Tool name 'assign_role_to_user' and description states it 'Assigns a security role to a specific user, granting them all the permissions defined in that role.' This modifies user access control state in an enterprise system.
Documented attack patterns abuse exactly the kind of access assign_role_to_user gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Dataverse MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for assign_role_to_user:
{
"version": "1",
"default": "deny",
"tools": {
"assign_role_to_user": {
"limits": [
{
"counter": "assign_role_to_user_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}assign_role_to_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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Assigns a security role to a specific user, granting them all the permissions defined in that role. Use this to provide users with the appropriate access levels for their job functions and responsibilities. It is categorised as a Write tool in the Dataverse MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Dataverse MCP Server MCP server in PolicyLayer and add a rule for assign_role_to_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 Dataverse MCP Server. Nothing to install.
assign_role_to_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 assign_role_to_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 assign_role_to_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.
assign_role_to_user is provided by the Dataverse MCP Server MCP server (mwhesse/dataverse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Dataverse MCP Server, 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.
71 Dataverse MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.