Method registerViewResources

packages/core/src/server/server.ts:969–1051

(
    toolName: string,
    view: ViewConfig,
    toolMeta: InternalToolMeta,
  )

  }

  private registerViewResources(
    toolName: string,
    view: ViewConfig,
    toolMeta: InternalToolMeta,
  ): void {
    // Append a content-derived version param so hosts (e.g. ChatGPT) bust
    // their cache when the bundle changes, but keep the URI stable across
    // `tools/list` calls when the bundle hasn't changed.
    const versionParam = this.computeViewVersionParam(view.component);

    const viewResource: ViewResourceConfig = {
      hostType: "mcp-app",
      uri: `ui://views/ext-apps/${view.component}.html${versionParam}`,
      mimeType: "text/html;profile=mcp-app",
      buildContentMeta: (
        { resourceDomains, connectDomains, domain, baseUriDomains },
        overrides,
      ) => {
        const defaults: McpAppsResourceMeta = {
          ui: {
            csp: {
              resourceDomains,
              connectDomains,
              baseUriDomains,
            },
            domain,
          },
        };

        const fromView: McpAppsResourceMeta = {
          ui: {
            ...(view.description && { description: view.description }),
            ...(view.prefersBorder !== undefined && {
              prefersBorder: view.prefersBorder,
            }),
            ...(view.domain && { domain: view.domain }),
            csp: {
              ...(view.csp?.resourceDomains && {
                resourceDomains: view.csp.resourceDomains,
              }),
              ...(view.csp?.connectDomains && {
                connectDomains: view.csp.connectDomains,
              }),
              ...(view.csp?.frameDomains && {
                frameDomains: view.csp.frameDomains,
              }),
              ...(view.csp?.baseUriDomains && {
                baseUriDomains: view.csp.baseUriDomains,
              }),
            },
          },
        };

        const ui = mergeWithUnion(mergeWithUnion(defaults, fromView), {
          ui: overrides,
        });

        const base: ResourceMeta = {