assign_license · Microsoft Graph MCP Server MCP

WHAT IT DOES

What assign_license does on Microsoft Graph MCP Server

AI agents use assign_license to create or update resources in Microsoft Graph MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Microsoft Graph MCP Server environment.

WHY IT NEEDS A POLICY

Why assign_license needs a policy

Assigning a license modifies user account state and potentially incurs financial impact by activating paid services, but the primary action is data modification (Write) rather than financial transaction. However, the severity is high because unauthorized license assignments could grant access to premium services, affect billing, and impact organizational compliance.

From the tool's definition Tool name 'assign_license' and description 'Assign a license to a user' indicate creation/modification of licensing data. This is a reversible change that affects user entitlements and M365 subscription assignments.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

assign_license Rate-limited

assign_license 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "assign_license": {
      "limits": [
        {
          "counter": "assign_license_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Microsoft Graph MCP Server, so you can run agents against it safely.

FAQ

Questions about assign_license

What does the assign_license tool do? +

Assign a license to a user. It is categorised as a Write tool in the Microsoft Graph MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on assign_license? +

Register the Microsoft Graph MCP Server MCP server in PolicyLayer and add a rule for assign_license: 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 Microsoft Graph MCP Server. Nothing to install.

What risk level is assign_license? +

assign_license is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit assign_license? +

Yes. Add a rate_limit block to the assign_license 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.

How do I block assign_license completely? +

Set action: deny in the PolicyLayer policy for assign_license. 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.

What MCP server provides assign_license? +

assign_license is provided by the Microsoft Graph MCP Server MCP server (ry-ops/microsoft-graph-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.