Class: Legion::MCP::Tools::DoAction

Inherits:
MCP::Tool
  • Object
show all
Extended by:
Logging::Helper
Defined in:
lib/legion/mcp/tools/do_action.rb

Overview

rubocop:disable Metrics/ClassLength

Class Method Summary collapse

Class Method Details

.call(intent:, params: {}, context: {}) ⇒ Object

rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/MethodLength, Metrics/PerceivedComplexity



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# File 'lib/legion/mcp/tools/do_action.rb', line 38

def call(intent:, params: {}, context: {}) # rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/MethodLength, Metrics/PerceivedComplexity
  request_id = LoggingSupport.request_id_from(context, params) || "mcp_#{SecureRandom.hex(6)}"
  normalized_context = symbolize_hash(context).merge(request_id: request_id)
  tool_params = params.transform_keys(&:to_sym)

  LoggingSupport.info(
    'do_action.start',
    request_id:   request_id,
    intent:       LoggingSupport.summarize_text(intent),
    params:       LoggingSupport.summarize_params(tool_params),
    context_keys: normalized_context.keys.map(&:to_s)
  )

  tier_result = try_tier0(intent, tool_params, normalized_context, request_id: request_id)

  if tier_result
    LoggingSupport.info(
      'do_action.tier_result',
      request_id: request_id,
      tier:       tier_result[:tier],
      reason:     tier_result[:reason],
      confidence: tier_result[:pattern_confidence] || tier_result.dig(:pattern, :confidence),
      tool_chain: Array(tier_result.dig(:pattern, :tool_chain))
    )
  else
    LoggingSupport.info('do_action.tier_result', request_id: request_id, tier: 'none', reason: 'tier router unavailable')
  end

  case tier_result&.dig(:tier)
  when 0
    response = text_response(tier_result[:response].merge(
                               _meta: { tier:       0,
                                        latency_ms: tier_result[:latency_ms],
                                        confidence: tier_result[:pattern_confidence] }
                             ))
    LoggingSupport.info(
      'do_action.complete',
      request_id: request_id,
      path:       'tier0',
      result:     LoggingSupport.summarize_result(response),
      matched:    Array(tier_result.dig(:pattern, :tool_chain))
    )
    return response
  when 1
    llm_result = try_tier1(intent, tier_result[:pattern], request_id: request_id)
    if llm_result
      response = text_response({ result: llm_result,
                                 _meta:  { tier: 1, pattern_hint: tier_result[:pattern][:intent_text] } })
      LoggingSupport.info(
        'do_action.complete',
        request_id: request_id,
        path:       'tier1',
        matched:    Array(tier_result.dig(:pattern, :tool_chain)),
        result:     LoggingSupport.summarize_result(response)
      )
      return response
    end
  when 2
    llm_result = try_tier2(intent, request_id: request_id)
    if llm_result
      response = text_response({ result: llm_result, _meta: { tier: 2 } })
      LoggingSupport.info(
        'do_action.complete',
        request_id: request_id,
        path:       'tier2',
        result:     LoggingSupport.summarize_result(response)
      )
      return response
    end
  end

  # Fall back to ContextCompiler tool matching
  matched = ContextCompiler.match_tool(intent)
  if matched.nil?
    LoggingSupport.warn(
      'do_action.no_match',
      request_id: request_id,
      intent:     LoggingSupport.summarize_text(intent)
    )
    return error_response("No matching tool found for intent: #{intent}")
  end

  matched_name = matched.respond_to?(:tool_name) ? matched.tool_name : matched.to_s
  LoggingSupport.info(
    'do_action.match',
    request_id:   request_id,
    matched_tool: matched_name,
    params:       LoggingSupport.summarize_params(tool_params)
  )

  result = tool_params.empty? ? matched.call : matched.call(**tool_params)
  LoggingSupport.info(
    'do_action.complete',
    request_id: request_id,
    path:       'context_compiler',
    matched:    matched_name,
    result:     LoggingSupport.summarize_result(result)
  )

  record_feedback(intent, matched_name, success: true)
  result
rescue StandardError => e
  handle_exception(e, level: :warn, operation: 'legion.mcp.tools.do_action.call')
  LoggingSupport.warn(
    'do_action.failed',
    request_id: defined?(request_id) ? request_id : nil,
    matched:    defined?(matched_name) ? matched_name : nil,
    error:      e.message
  )
  record_feedback(intent, matched_name, success: false) if defined?(matched_name)
  error_response("Failed: #{e.message}")
end