ServiceNow MCP Server

Instructions

Implementation Reference

• src/servicenow_mcp/tools/change_tools.py:669-755 (handler)

  The core handler function implementing the submit_change_for_approval tool logic: validates params, updates change request state to 'assess', creates approval record in sysapproval_approver table.

  def submit_change_for_approval(
      auth_manager: AuthManager,
      server_config: ServerConfig,
      params: Dict[str, Any],
  ) -> Dict[str, Any]:
      """
      Submit a change request for approval in ServiceNow.
  
      Args:
          auth_manager: The authentication manager.
          server_config: The server configuration.
          params: The parameters for submitting a change request for approval.
  
      Returns:
          The result of the submission.
      """
      # Unwrap and validate parameters
      result = _unwrap_and_validate_params(
          params, 
          SubmitChangeForApprovalParams,
          required_fields=["change_id"]
      )
      
      if not result["success"]:
          return result
      
      validated_params = result["params"]
      
      # Prepare the request data
      data = {
          "state": "assess",  # Set state to "assess" to submit for approval
      }
      
      # Add approval comments if provided
      if validated_params.approval_comments:
          data["work_notes"] = validated_params.approval_comments
      
      # 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",
          }
      
      # Add Content-Type header
      headers["Content-Type"] = "application/json"
      
      # Make the API request
      url = f"{instance_url}/api/now/table/change_request/{validated_params.change_id}"
      
      try:
          response = requests.patch(url, json=data, headers=headers)
          response.raise_for_status()
          
          # Now, create an approval request
          approval_url = f"{instance_url}/api/now/table/sysapproval_approver"
          approval_data = {
              "document_id": validated_params.change_id,
              "source_table": "change_request",
              "state": "requested",
          }
          
          approval_response = requests.post(approval_url, json=approval_data, headers=headers)
          approval_response.raise_for_status()
          
          approval_result = approval_response.json()
          
          return {
              "success": True,
              "message": "Change request submitted for approval successfully",
              "approval": approval_result["result"],
          }
      except requests.exceptions.RequestException as e:
          logger.error(f"Error submitting change for approval: {e}")
          return {
              "success": False,
              "message": f"Error submitting change for approval: {str(e)}",
          }

• src/servicenow_mcp/tools/change_tools.py:84-89 (schema)

  Pydantic BaseModel defining input schema for the tool: requires change_id, optional approval_comments.

  class SubmitChangeForApprovalParams(BaseModel):
      """Parameters for submitting a change request for approval."""
  
      change_id: str = Field(..., description="Change request ID or sys_id")
      approval_comments: Optional[str] = Field(None, description="Comments for the approval request")

• src/servicenow_mcp/utils/tool_utils.py:468-474 (registration)

  MCP tool registration in get_tool_definitions(): maps name to (handler alias, schema, return type, description, serialization).

  "submit_change_for_approval": (
      submit_change_for_approval_tool,
      SubmitChangeForApprovalParams,
      str,
      "Submit a change request for approval",
      "str",  # Tool returns simple message
  ),

• src/servicenow_mcp/tools/__init__.py:23-32 (registration)

  Export/import of the handler function in tools package __init__.py for module-level access.

  from servicenow_mcp.tools.change_tools import (
      add_change_task,
      approve_change,
      create_change_request,
      get_change_request_details,
      list_change_requests,
      reject_change,
      submit_change_for_approval,
      update_change_request,
  )

• src/servicenow_mcp/utils/tool_utils.py:84-85 (helper)

  Import alias of the handler as submit_change_for_approval_tool used in MCP registration.

      submit_change_for_approval as submit_change_for_approval_tool,
  )