Incomplete Error Handling Examples in MCP Tool Template

[farce1]

Issue Description

The example MCP tool (hello.py) doesn't show error handling patterns, which are crucial for production MCP servers.

Problem

• The example tool only shows a basic happy path implementation
• No demonstration of error handling, validation, or edge cases
• Production MCP servers need robust error handling to prevent crashes

Current Code

The hello.py example is very basic:

@mcp.tool()
async def hello(name: str) -> str:
    return f"Hello, {name}!"

Suggested Improvements

Add examples showing:

1. Input validation
2. Error handling with try/catch blocks
3. Custom error messages for MCP clients
4. Timeout handling for async operations
5. Resource cleanup patterns

Example Enhancement

@mcp.tool()
async def hello(name: str) -> str:
    """
    Say hello to someone.
    
    Args:
        name: The name to greet (must be non-empty)
    
    Raises:
        ValueError: If name is empty or invalid
    """
    if not name or not name.strip():
        raise ValueError("Name cannot be empty")
    
    try:
        # Example of more complex operation that could fail
        validated_name = name.strip()
        return f"Hello, {validated_name}!"
    except Exception as e:
        # Log error and return MCP-friendly error
        logger.error(f"Error in hello tool: {e}")
        raise RuntimeError(f"Failed to process greeting: {str(e)}")

Impact

Without proper error handling examples, users might create fragile MCP servers that crash on unexpected input.