Enterprise HR MCP Server

Enterprise HR MCP Server

Exposes tools for employee information, leave balance, support tickets, and product inventory, with AI agent integration and A2A communication for escalation.

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README

MCP + A2A Enterprise HR Demo

A hands-on project to practice Model Context Protocol (MCP) and basic Agent-to-Agent (A2A) communication using a mock Enterprise HR system.

What I Built

1. MCP Server

Created an Enterprise HR MCP server exposing tools for:

  • Employee information
  • Leave balance
  • Support tickets
  • Product inventory

The tools were tested successfully using the MCP Inspector and MCP client.

2. AI Agent + MCP

Connected a Groq LLM to the MCP client.

The LLM:

  1. Receives the user request.
  2. Discovers the available MCP tools.
  3. Selects the appropriate tool.
  4. Generates the required arguments.
  5. Calls the MCP tool.
  6. Receives the result.

Example:

User
 ↓
Groq LLM
 ↓
get_leave_balance
 ↓
MCP Client
 ↓
HR MCP Server
 ↓
Leave Balance

3. A2A Communication

Added an Escalation Agent to the primary agent.

The LLM can decide whether a request should:

  • Use an MCP tool, or
  • Be sent to the Escalation Agent.

Example:

User
 ↓
Primary Agent + LLM
 ↓
Decision
 ├── MCP Tool → HR MCP Server
 │
 └── A2A → Escalation Agent
             ↓
          Response
             ↓
       Primary Agent

Main Goal

This project was built as a hands-on practice project to understand:

  • MCP servers
  • MCP tools
  • MCP clients
  • Tool discovery
  • LLM tool calling
  • A2A agent communication
  • How MCP and A2A can work together

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