# Model Context Protocol (MCP) Integration

## Status: Planned

## Overview

AgentDock Core will integrate the Model Context Protocol (MCP) to enable standardized tool discovery and execution across different AI agents and services. This integration will allow AgentDock agents to leverage external tools while maintaining our core architecture principles.

## Architecture

```mermaid
graph TD
    A[AgentDock Core] --> B[MCP Client Layer]
    B --> C[Vercel AI SDK]
    C --> D[External MCP Servers]
    
    subgraph "Core Components"
        E[AgentNode]
        F[Tool Registry]
        G[MCP Tool Factory]
    end
    
    A --> E
    E --> F
    F --> G
    G --> B
    
    style A fill:#b3e6ff,stroke:#006699
    style B fill:#ffe6b3,stroke:#cc8800
    style C fill:#d9f2d9,stroke:#006600
    style D fill:#ffcccc,stroke:#990000
```

## Implementation Strategy

### Phase 1: Core MCP Client Integration

1. **MCP Client Layer**
   - Utilize Vercel AI SDK's built-in MCP client capabilities
   - Create a standardized interface for tool discovery and execution
   - Maintain compatibility with existing node-based architecture

2. **Tool Registry Integration**
   ```typescript
   interface MCPToolConfig {
     transport: {
       type: 'stdio' | 'sse';
       command?: string;
       args?: string[];
       url?: string;
     };
     schemas?: Record<string, any>;
   }
   ```

3. **Agent Configuration**
   ```json
   {
     "nodes": ["llm.anthropic", "mcp.cursor"],
     "nodeConfigurations": {
       "llm.anthropic": {
         "model": "gpt-4.1"
       },
       "mcp.cursor": {
         "transport": {
           "type": "stdio",
           "command": "cursor-tools"
         }
       }
     }
   }
   ```

### Tool Discovery Flow

```mermaid
sequenceDiagram
    participant Agent as AgentNode
    participant Registry as Tool Registry
    participant MCP as MCP Client
    participant Server as External Server
    
    Agent->>Registry: Request tools
    Registry->>MCP: Initialize client
    MCP->>Server: Discover tools
    Server-->>MCP: Tool schemas
    MCP-->>Registry: Register tools
    Registry-->>Agent: Available tools
```

## Core Features

1. **Dynamic Tool Discovery**
   - Automatic tool registration from MCP servers
   - Schema validation for tool inputs/outputs
   - Runtime tool availability checks

2. **Transport Layer Support**
   - Standard I/O for local tools
   - Server-Sent Events (SSE) for remote tools
   - Extensible transport system

3. **Error Handling**
   - Graceful fallbacks for unavailable tools
   - Clear error messages for configuration issues
   - Connection retry mechanisms

## Usage Examples

### Local Tool Integration
```typescript
// Example: Using Cursor Tools via MCP
const config = {
  transport: {
    type: 'stdio',
    command: 'cursor-tools',
    args: ['browser', 'open']
  }
};

await agent.registerMCPTools(config);
```

### Remote Tool Integration
```typescript
// Example: Using Remote MCP Server
const config = {
  transport: {
    type: 'sse',
    url: 'https://mcp-server.example.com/sse'
  },
  schemas: {
    'get-weather': {
      parameters: {
        location: { type: 'string' }
      }
    }
  }
};

await agent.registerMCPTools(config);
```

## Security Considerations

1. **Tool Validation**
   - Schema validation for all tool inputs
   - Sanitization of command arguments
   - Resource usage limits

2. **Transport Security**
   - TLS for remote connections
   - Local tool execution sandboxing
   - Access control for sensitive operations

## Future Enhancements

1. **Tool Caching**
   - Cache tool schemas for faster startup
   - Periodic schema refresh
   - Offline mode support

2. **Advanced Features**
   - Tool composition and chaining
   - Custom transport layers
   - Enhanced error recovery

## Pro Features Preview

AgentDock Pro will extend the MCP integration with advanced capabilities:

```mermaid
graph TD
    A[AgentDock Pro] --> B[MCP Client]
    A --> C[MCP Server]
    
    subgraph "Client Capabilities"
        B --> D[External Tools]
        B --> E[Remote Services]
    end
    
    subgraph "Server Capabilities"
        C --> F[Workflow Exposure]
        C --> G[Resource Management]
    end
    
    style A fill:#b3e6ff,stroke:#006699
    style B fill:#ffe6b3,stroke:#cc8800
    style C fill:#d9f2d9,stroke:#006600
```

- **Dual-Role Architecture**: Function as both MCP client and server
- **Workflow Exposure**: Share workflows as MCP resources
- **Enhanced Resource Management**: Advanced control over exposed capabilities
- **Cross-Workflow Integration**: Compose workflows using MCP protocol

*(More details coming soon in Pro documentation)*

## Development Timeline

1. **Phase 1: Core Integration** (Current)
   - [x] Design architecture
   - [ ] Implement MCP client layer
   - [ ] Add tool registry support
   - [ ] Basic transport layers

2. **Phase 2: Enhanced Features**
   - [ ] Advanced error handling
   - [ ] Tool caching system
   - [ ] Security improvements

3. **Phase 3: Optimization**
   - [ ] Performance improvements
   - [ ] Extended transport options
   - [ ] Developer tooling 