# 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:

```text
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:

```text
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