update_change_request

Modify details of an existing change request in ServiceNow, including assignment group, category, description, impact, risk, start/end dates, state, and work notes using the Change Id.

Instructions

Update an existing change request in ServiceNow

Input Schema

TableJSON Schema

Name	Required	Description	Default
`params`	Yes

Implementation Reference

src/servicenow_mcp/tools/change_tools.py:302-393 (handler)

The core handler function that executes the update_change_request tool. It validates input parameters using UpdateChangeRequestParams, prepares the update data, and sends a PUT request to the ServiceNow change_request table API endpoint.

def update_change_request(
    auth_manager: AuthManager,
    server_config: ServerConfig,
    params: Dict[str, Any],
) -> Dict[str, Any]:
    """
    Update an existing change request in ServiceNow.

    Args:
        auth_manager: The authentication manager.
        server_config: The server configuration.
        params: The parameters for updating the change request.

    Returns:
        The updated change request.
    """
    # Unwrap and validate parameters
    result = _unwrap_and_validate_params(
        params, 
        UpdateChangeRequestParams, 
        required_fields=["change_id"]
    )
    
    if not result["success"]:
        return result
    
    validated_params = result["params"]
    
    # Prepare the request data
    data = {}
    
    # Add fields if provided
    if validated_params.short_description:
        data["short_description"] = validated_params.short_description
    if validated_params.description:
        data["description"] = validated_params.description
    if validated_params.state:
        data["state"] = validated_params.state
    if validated_params.risk:
        data["risk"] = validated_params.risk
    if validated_params.impact:
        data["impact"] = validated_params.impact
    if validated_params.category:
        data["category"] = validated_params.category
    if validated_params.assignment_group:
        data["assignment_group"] = validated_params.assignment_group
    if validated_params.start_date:
        data["start_date"] = validated_params.start_date
    if validated_params.end_date:
        data["end_date"] = validated_params.end_date
    if validated_params.work_notes:
        data["work_notes"] = validated_params.work_notes
    
    # 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.put(url, json=data, headers=headers)
        response.raise_for_status()
        
        result = response.json()
        
        return {
            "success": True,
            "message": "Change request updated successfully",
            "change_request": result["result"],
        }
    except requests.exceptions.RequestException as e:
        logger.error(f"Error updating change request: {e}")
        return {
            "success": False,
            "message": f"Error updating change request: {str(e)}",
        }

src/servicenow_mcp/tools/change_tools.py:38-52 (schema)

Pydantic model defining the input schema for the update_change_request tool, including required change_id and optional fields for updating the change request.

class UpdateChangeRequestParams(BaseModel):
    """Parameters for updating a change request."""

    change_id: str = Field(..., description="Change request ID or sys_id")
    short_description: Optional[str] = Field(None, description="Short description of the change request")
    description: Optional[str] = Field(None, description="Detailed description of the change request")
    state: Optional[str] = Field(None, description="State of the change request")
    risk: Optional[str] = Field(None, description="Risk level of the change")
    impact: Optional[str] = Field(None, description="Impact of the change")
    category: Optional[str] = Field(None, description="Category of the change")
    assignment_group: Optional[str] = Field(None, description="Group assigned to the change")
    start_date: Optional[str] = Field(None, description="Planned start date (YYYY-MM-DD HH:MM:SS)")
    end_date: Optional[str] = Field(None, description="Planned end date (YYYY-MM-DD HH:MM:SS)")
    work_notes: Optional[str] = Field(None, description="Work notes to add to the change request")

src/servicenow_mcp/utils/tool_utils.py:497-503 (registration)
Registers the update_change_request tool in the tool_definitions dictionary used by the MCP server, associating the handler function, input schema, return type, description, and serialization method.
```
"update_change_request": (
    update_change_request_tool,
    UpdateChangeRequestParams,
    str,
    "Update an existing change request in ServiceNow",
    "str",
),
```

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

Imports the update_change_request function into the tools package namespace, exposing it for use.

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,
)

ServiceNow MCP Server