Main CI failed: E2E Tests — sdk-typescript/mcp-server.test.ts > … > should use MCP add tool to add two numbers (+6 more) #12357

A main-branch E2E Tests run failed on main.

Failing tests

• sdk-typescript/mcp-server.test.ts > MCP Server Integration (E2E) > Basic MCP Tool Usage > should use MCP add tool to add two numbers
• sdk-typescript/mcp-server.test.ts > MCP Server Integration (E2E) > Basic MCP Tool Usage > should use MCP multiply tool to multiply two numbers
• sdk-typescript/mcp-server.test.ts > MCP Server Integration (E2E) > Complex MCP Operations > should chain multiple MCP tool calls
• sdk-typescript/mcp-server.test.ts > MCP Server Integration (E2E) > Complex MCP Operations > should handle multiple calls to the same MCP tool
• sdk-typescript/mcp-server.test.ts > MCP Server Integration (E2E) > Complex MCP Operations > should support multi-turn asyncGenerator prompt with MCP tools
• sdk-typescript/mcp-server.test.ts > MCP Server Integration (E2E) > Complex MCP Operations > should support multi-turn MCP tools with canUseTool
• sdk-typescript/mcp-server.test.ts > MCP Server Integration (E2E) > MCP Tool Message Flow > should receive proper message sequence for MCP tool usage

This issue is labeled for autofix so the existing agent can create a repair PR.
It is deduped by failing test, so every later commit that hits the same
failure is appended below instead of opening another issue.

Recurrences

• 3dc9778dea59 · 2026-09-21T11:57:42Z · run 35590943362
• 065dd351c8bb · 2026-09-21T10:35:28Z · run 35583684867
• af4e3b298e24 · 2026-09-21T09:49:33Z · run 35578999463
• 74c0916a3ce2 · 2026-09-21T08:42:01Z · run 35574832699
• 813232e9674d · 2026-09-21T07:53:07Z · run 35569928775
• 1ac097163389 · 2026-09-21T06:31:53Z · run 35560744237
• 2cb2a4ac5091 · 2026-09-21T05:24:38Z · run 35559695078
• 1cc63cfed4a8 · 2026-09-21T04:18:18Z · run 35555309008
• 17b5c940a6fd · 2026-09-21T03:10:39Z · run 35553294146
• ae26d7524cc0 · 2026-09-21T02:20:49Z · run 35550315999

Older recurrences trimmed.