content: """Custom exceptions for FastMCP."""
  
  
  class FastMCPError(Exception):
      """Base error for FastMCP."""
  
  
  class ValidationError(FastMCPError):
      """Error in validating parameters or return values."""
  
  
  class ResourceError(FastMCPError):
      """Error in resource operations."""
  
  
  class ToolError(FastMCPError):
      """Error in tool operations."""
  
  
  class InvalidSignature(Exception):
      """Invalid signature for use with FastMCP."""
  