Steel MCP Server

Instructions

Implementation Reference

• src/index.ts:805-819 (handler)

  The handler function for the scroll_up tool. It scrolls up the page by the specified pixels or one page using PageUp if not specified.

  async function handleScrollUp(page: Page, args: any): Promise<CallToolResult> {
    const { pixels } = args;
    if (pixels !== undefined) {
      await page.evaluate((scrollAmount) => {
        window.scrollBy(0, -scrollAmount);
      }, pixels);
    } else {
      await page.keyboard.press("PageUp");
    }
  
    return {
      isError: false,
      content: [{ type: "text", text: `Scrolled up by ${pixels ?? "one page"}` }],
    };
  }

• src/index.ts:538-553 (schema)

  The input schema and metadata definition for the scroll_up tool, including name, description, and inputSchema.

  {
    name: "scroll_up",
    description:
      "Scroll up the page by a pixel amount - if no pixels are specified, scrolls up one page",
    inputSchema: {
      type: "object",
      properties: {
        pixels: {
          type: "integer",
          description:
            "The number of pixels to scroll up. If not specified, scrolls up one page.",
        },
      },
      required: [],
    },
  },

• src/index.ts:931-932 (registration)

  The switch case in handleToolCall that registers and dispatches to the scroll_up handler.

  case "scroll_up":
    result = await handleScrollUp(page, args);