Class: Otto::MCP::Validator

Inherits:
Object
  • Object
show all
Defined in:
lib/otto/mcp/schema_validation.rb

Overview

JSON Schema validator for MCP protocol requests

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Validator

Returns a new instance of Validator.



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# File 'lib/otto/mcp/schema_validation.rb', line 19

def initialize
  @schemas                = {}
  @json_schemer_available = defined?(JSONSchemer)
end

Instance Method Details

#validate_request(data) ⇒ Object 



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# File 'lib/otto/mcp/schema_validation.rb', line 24

def validate_request(data)
  return true unless @json_schemer_available

  schema            = mcp_request_schema
  validation_errors = schema.validate(data).to_a

  unless validation_errors.empty?
    error_messages = validation_errors.map { |error| error['details'] || error['error'] || error.to_s }.join(', ')
    raise ValidationError, "Invalid MCP request: #{error_messages}"
  end

  true
end

#validate_tool_arguments(tool_name, arguments, schema) ⇒ Object 



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# File 'lib/otto/mcp/schema_validation.rb', line 38

def validate_tool_arguments(tool_name, arguments, schema)
  return true unless @json_schemer_available && schema

  schemer           = JSONSchemer.schema(schema)
  validation_errors = schemer.validate(arguments).to_a

  unless validation_errors.empty?
    error_messages = validation_errors.map { |error| error['details'] || error['error'] || error.to_s }.join(', ')
    raise ValidationError, "Invalid arguments for tool #{tool_name}: #{error_messages}"
  end

  true
end