WeChat Mini Program Dev MCP

Instructions

Implementation Reference

• src/tools/page.ts:58-73 (handler)

  The execute function that handles the page_getElement tool: parses input parameters, connects to the page via manager, resolves the element using the selector and optional innerSelector, summarizes the element, and returns a formatted JSON text result.

  execute: async (rawArgs, context: ToolContext) => {
    const args = getElementParameters.parse(rawArgs ?? {});
    return manager.withPage<ContentResult>(
      context.log,
      { overrides: args.connection },
      async (page) => {
        const element = await resolveElement(
          page,
          args.selector,
          args.innerSelector
        );
        const summary = await summarizeElement(element);
        return toTextResult(formatJson(summary));
      }
    );
  },

• src/tools/page.ts:37-40 (schema)

  Zod schema defining the input parameters for the page_getElement tool, extending connectionContainerSchema with required selector and optional innerSelector.

  const getElementParameters = connectionContainerSchema.extend({
    selector: z.string().trim().min(1),
    innerSelector: z.string().trim().min(1).optional(),
  });

• src/tools/page.ts:42-51 (registration)

  Registers the page_getElement tool (via createGetElementTool) among other page tools in the createPageTools function.

  export function createPageTools(manager: WeappAutomatorManager): AnyTool[] {
    return [
      createGetElementTool(manager),
      createWaitForElementTool(manager),
      createWaitForTimeoutTool(manager),
      createGetPageDataTool(manager),
      createSetPageDataTool(manager),
      createCallPageMethodTool(manager),
    ];
  }

• src/tools.ts:7-13 (registration)

  Aggregates and registers page tools (including page_getElement) with application and element tools in createTools.

  export function createTools(manager: WeappAutomatorManager): AnyTool[] {
    return [
      ...createApplicationTools(manager),
      ...createPageTools(manager),
      ...createElementTools(manager),
    ];
  }

• src/index.ts:17-17 (registration)

  Final registration of all tools, including page_getElement, to the FastMCP server instance.

  server.addTools(createTools(manager));