feat: scenario tools [CW-4597] (#11908)

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Sojan Jose <sojan@pepalo.com>

enterprise/lib/captain/tools/base_public_tool.rb

@@ -0,0 +1,45 @@
+require 'agents'
+
+class Captain::Tools::BasePublicTool < Agents::Tool
+  def initialize(assistant)
+    @assistant = assistant
+    super()
+  end
+
+  def active?
+    # Public tools are always active
+    true
+  end
+
+  def permissions
+    # Override in subclasses to specify required permissions
+    # Returns empty array for public tools (no permissions required)
+    []
+  end
+
+  private
+
+  def account_scoped(model_class)
+    model_class.where(account_id: @assistant.account_id)
+  end
+
+  def find_conversation(state)
+    conversation_id = state&.dig(:conversation, :id)
+    return nil unless conversation_id
+
+    account_scoped(::Conversation).find_by(id: conversation_id)
+  end
+
+  def find_contact(state)
+    contact_id = state&.dig(:contact, :id)
+    return nil unless contact_id
+
+    account_scoped(::Contact).find_by(id: contact_id)
+  end
+
+  def log_tool_usage(action, details = {})
+    Rails.logger.info do
+      "#{self.class.name}: #{action} for assistant #{@assistant&.id} - #{details.inspect}"
+    end
+  end
+end