ServiceNow MCP Server

Instructions

Implementation Reference

• src/servicenow_mcp/tools/story_tools.py:632-692 (handler)

  The primary handler function that executes the delete_story_dependency tool. Validates input params, constructs the ServiceNow API DELETE endpoint for m2m_story_dependencies table using the dependency_id, and handles the HTTP request/response.

  def delete_story_dependency(
      auth_manager: AuthManager,
      server_config: ServerConfig,
      params: Dict[str, Any],
  ) -> Dict[str, Any]:
      """
      Delete a story dependency in ServiceNow.
  
      Args:
          auth_manager: The authentication manager.
          server_config: The server configuration.
          params: The parameters for deleting a story dependency.
  
      Returns:
          The deleted story dependency.
      """
      # Unwrap and validate parameters    
      result = _unwrap_and_validate_params(
          params, 
          DeleteStoryDependencyParams,
          required_fields=["dependency_id"]
      )
      
      if not result["success"]:
          return result
      
      validated_params = result["params"]
      
      # Get the instance URL
      instance_url = _get_instance_url(auth_manager, server_config)
      if not instance_url:
          return {
              "success": False,
              "message": "Cannot find instance_url in either server_config or auth_manager",
          }
      
      # Get the headers
      headers = _get_headers(auth_manager, server_config)
      if not headers:
          return {
              "success": False,   
              "message": "Cannot find get_headers method in either auth_manager or server_config",
          }
      
      # Make the API request
      url = f"{instance_url}/api/now/table/m2m_story_dependencies/{validated_params.dependency_id}"
      
      try:
          response = requests.delete(url, headers=headers)
          response.raise_for_status()
          
          return {
              "success": True,
              "message": "Story dependency deleted successfully",
          }
      except requests.exceptions.RequestException as e:
          logger.error(f"Error deleting story dependency: {e}")
          return {
              "success": False,
              "message": f"Error deleting story dependency: {str(e)}",
          }

• src/servicenow_mcp/tools/story_tools.py:76-80 (schema)

  Pydantic BaseModel schema defining the input parameters for the delete_story_dependency tool, specifically requiring the sys_id of the dependency to delete.

  class DeleteStoryDependencyParams(BaseModel):
      """Parameters for deleting a story dependency."""
  
      dependency_id: str = Field(..., description="Sys_id of the dependency is required")

• src/servicenow_mcp/utils/tool_utils.py:872-878 (registration)

  Registration of the 'delete_story_dependency' tool in the central tool_definitions dictionary used by the MCP server. Maps the tool name to its handler function (aliased), params schema, return type, description, and serialization method.

  "delete_story_dependency": (
      delete_story_dependency_tool,
      DeleteStoryDependencyParams,
      str,
      "Delete a story dependency in ServiceNow",
      "str",
  ),