Function callTool

core/tools/callTool.ts:235–280

(
  tool: Tool,
  toolCall: ToolCall,
  extras: ToolExtras,
)

// Returns an error context item if the tool call fails
// Note: Edit tool is handled on client
export async function callTool(
  tool: Tool,
  toolCall: ToolCall,
  extras: ToolExtras,
): Promise<{
  contextItems: ContextItem[];
  errorMessage: string | undefined;
  errorReason?: ContinueErrorReason;
  mcpUiState?: McpUiState;
}> {
  try {
    const args = safeParseToolCallArgs(toolCall);
    const { contextItems, mcpUiState } = tool.uri
      ? await callToolFromUri(tool.uri, args, extras)
      : {
          contextItems: await callBuiltInTool(tool.function.name, args, extras),
        };
    if (tool.faviconUrl) {
      contextItems.forEach((item) => {
        item.icon = tool.faviconUrl;
      });
    }

    return {
      contextItems,
      errorMessage: undefined,
      mcpUiState,
    };
  } catch (e) {
    let errorMessage = `${e}`;
    let errorReason: ContinueErrorReason | undefined;

    if (e instanceof ContinueError) {
      errorMessage = e.message;
      errorReason = e.reason;
    } else if (e instanceof Error) {
      errorMessage = e.message;
    }

    return {
      contextItems: [],
      errorMessage,
      errorReason,
    };
  }
}