Remove a user from a group
AI agents call remove_user_from_group to permanently remove resources in Microsoft Graph MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Removing a user from a group is a destructive action: it revokes all access rights, SharePoint permissions, license assignments, and application access tied to that group. While a re-add is theoretically possible, the immediate blast radius is high (access loss, compliance implications), and the action cannot be automatically undone by the system.
From the tool's definition 'Remove a user from a group' — removal of group membership is not easily reversible without knowing the prior state, and losing group membership can immediately revoke access to resources, applications, and permissions.
Attacks that exploit this kind of access
Remove a user from a group. It is categorised as a Destructive tool in the Microsoft Graph MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Microsoft Graph MCP Server MCP server in PolicyLayer and add a rule for remove_user_from_group: 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.
remove_user_from_group is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the remove_user_from_group 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 remove_user_from_group. 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.
remove_user_from_group 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.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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