ServiceNow MCP Server

Instructions

Implementation Reference

• src/servicenow_mcp/tools/story_tools.py:469-558 (handler)

  The handler function that executes the tool logic: validates parameters, builds ServiceNow query for m2m_story_dependencies table, fetches and returns dependencies.
  def list_story_dependencies( auth_manager: AuthManager, server_config: ServerConfig, params: Dict[str, Any], ) -> Dict[str, Any]: """ List story dependencies from ServiceNow. Args: auth_manager: The authentication manager. server_config: The server configuration. params: The parameters for listing story dependencies. Returns: A list of story dependencies. """ # Unwrap and validate parameters result = _unwrap_and_validate_params( params, ListStoryDependenciesParams ) if not result["success"]: return result validated_params = result["params"] # Build the query query_parts = [] if validated_params.dependent_story: query_parts.append(f"dependent_story={validated_params.dependent_story}") if validated_params.prerequisite_story: query_parts.append(f"prerequisite_story={validated_params.prerequisite_story}") # Add any additional query string if validated_params.query: query_parts.append(validated_params.query) # Combine query parts query = "^".join(query_parts) if query_parts else "" # 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" params = { "sysparm_limit": validated_params.limit, "sysparm_offset": validated_params.offset, "sysparm_query": query, "sysparm_display_value": "true", } try: response = requests.get(url, headers=headers, params=params) response.raise_for_status() result = response.json() # Handle the case where result["result"] is a list story_dependencies = result.get("result", []) count = len(story_dependencies) return { "success": True, "story_dependencies": story_dependencies, "count": count, "total": count, # Use count as total if total is not provided } except requests.exceptions.RequestException as e: logger.error(f"Error listing story dependencies: {e}") return { "success": False, "message": f"Error listing story dependencies: {str(e)}", }
• src/servicenow_mcp/tools/story_tools.py:61-69 (schema)

  Pydantic model defining the input parameters for the list_story_dependencies tool.
  class ListStoryDependenciesParams(BaseModel): """Parameters for listing story dependencies.""" limit: Optional[int] = Field(10, description="Maximum number of records to return") offset: Optional[int] = Field(0, description="Offset to start from") query: Optional[str] = Field(None, description="Additional query string") dependent_story: Optional[str] = Field(None, description="Sys_id of the dependent story is required") prerequisite_story: Optional[str] = Field(None, description="Sys_id that this story depends on is required")
• src/servicenow_mcp/utils/tool_utils.py:858-864 (registration)

  Registration of the tool in the central tool_definitions dictionary, mapping name to implementation, params schema, return type, description, and serialization method.
  "list_story_dependencies": ( list_story_dependencies_tool, ListStoryDependenciesParams, str, # Expects JSON string "List story dependencies from ServiceNow", "json", # Tool returns list/dict ),
• src/servicenow_mcp/utils/tool_utils.py:302-302 (registration)

  Import and alias of the handler function for use in tool registration.
  list_story_dependencies as list_story_dependencies_tool,
• src/servicenow_mcp/tools/__init__.py:96-96 (registration)

  Exposes the tool function via __init__.py for easy import.
  list_story_dependencies,