Microsoft MCP Server for Enterprise — agentic threat model

Not certain from the listing — the server itself is model-agnostic and acts as an MCP tool provider; model-level threats like prompt injection or adversarial reprogramming depend entirely on the external orchestrating LLM used to call this server.

The agent does not maintain its own vector store or training data, but directly queries Entra ID. The primary threat is data exfiltration of sensitive directory objects, user metadata, and group memberships via natural-language queries.

Exposes tool-calling interfaces for querying Entra ID. Vulnerabilities include insecure tool integration where an orchestrator might be manipulated via prompt injection to execute overly broad directory searches or dump user lists.

Not certain from the listing — hosting and sandboxing depend on where the MCP server is run (e.g., locally, in a container, or cloud-hosted). Secrets management for the underlying Microsoft Graph API credentials is a critical infrastructure risk.

Not certain from the listing — there is no mention of built-in logging, audit trails, or guardrails to detect anomalous directory harvesting patterns or unauthorized query attempts through the MCP interface.

Explicitly relies on the connected identity's Microsoft Graph API scopes to bound exposure. While this leverages existing Entra ID OAuth/RBAC controls, any over-privileged service principal assigned to the MCP server compromises this boundary.

Designed to be plugged into broader agentic workflows (MCP clients). This introduces significant A2A trust abuse risks, where a compromised upstream agent could query this server to map the enterprise network and identify high-value targets.