# Task ID: 7
# Title: Implement Tool Handlers
# Status: pending
# Dependencies: 2, 6
# Priority: high
# Description: Create the handler functions for the MCP tools that process incoming requests and return responses.
# Details:
1. Implement reviewPlanHandler:
   ```typescript
   async function reviewPlanHandler(params: ReviewPlanParams): Promise<ReviewResponse> {
     try {
       // Validate input parameters
       // Call review engine
       const response = await reviewEngine.reviewPlan(params);
       return response;
     } catch (error) {
       // Handle and log errors
       // Return appropriate error response
     }
   }
   ```

2. Implement reviewImplementationHandler:
   ```typescript
   async function reviewImplementationHandler(params: ReviewImplementationParams): Promise<ReviewResponse> {
     try {
       // Validate input parameters
       // Call review engine
       const response = await reviewEngine.reviewImplementation(params);
       return response;
     } catch (error) {
       // Handle and log errors
       // Return appropriate error response
     }
   }
   ```

3. Add parameter validation
4. Implement error handling and logging
5. Add performance monitoring

# Test Strategy:
Test handlers with various input parameters, including edge cases. Verify correct error handling for invalid inputs and internal errors. Test performance under load with simulated requests.