fix(responses): enforce explicit empty tool catalogs - #2370
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Included review availability: Your plan provides up to 10 included reviews per hour; 7 remain after this review. 📝 WalkthroughWalkthroughThe undeclared-tool guard distinguishes omitted, unreadable, and explicit empty catalogs. It supports nameless client call types and refreshes authorization after request reconstruction, including recovery and retry flows. ChangesUndeclared Tool Guard
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟡 Moderate · up to The PR is not merge-ready yet because duplicate declarations in the modified test file can prevent the test suite from loading; remove the duplicates and rerun the checks. Sequence Diagram(s)sequenceDiagram
participant Client
participant ResponsesCore
participant RequestBuilder
participant ToolGuard
Client->>ResponsesCore: submit response request
ResponsesCore->>RequestBuilder: build normalized request
RequestBuilder-->>ResponsesCore: return catalog and tool names
ResponsesCore->>ToolGuard: validate named and nameless tool calls
ResponsesCore->>RequestBuilder: rebuild after recovery or retry
RequestBuilder-->>ResponsesCore: return rebuilt request
ResponsesCore->>ToolGuard: refresh authorization state
ToolGuard-->>Client: allow or rewrite the response
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Inline comments:
In `@src/server/responses/core.ts`:
- Around line 2966-2969: Update the undeclaredToolGuardActive logic near
collectDeclaredWireToolNames to recognize explicit tool catalogs in both
top-level outboundRequestBody.tools and input items with type
"additional_tools", including empty arrays. Prefer returning or deriving an
explicit-catalog flag from the helper so streaming and non-streaming refusal
paths activate consistently, and add regression coverage for both transports.
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src/server/responses/core.tstests/responses-undeclared-tool-guard.test.ts
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리뷰 · 우선순위 66 / 80설명: 이 PR은 Responses 패스스루에서 도구 목록이 아예 없을 때와, 호출자가 빈 목록 src/server/responses/core.ts hasExplicitWireToolCatalog - 읽을 수 있는 본문에 tools 가 배열이면 이름이 0개여도 가드를 켠다 메인테이너의 판단이 필요한 지점
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Inline comments:
In `@src/server/responses-undeclared-tool-guard.ts`:
- Around line 62-71: Update hasExplicitWireToolCatalog to activate only when
tools or additional_tools.tools is an empty array or contains at least one
readable tool specification, matching what buildTools preserves; return false
for arrays containing only unreadable entries such as null or incomplete
objects. Add regression tests covering both accepted unreadable shapes so the
guard does not reject client tool calls when no usable catalog entries remain.
In `@src/server/responses/core.ts`:
- Around line 2967-2968: Preserve whether an explicit tool catalog was present
before adapter rewriting, even when normalizeXaiResponsesWebSearch removes the
final cached-only entry; update the guard logic around undeclaredToolGuardActive
to use the original readable request or adapter metadata, and recompute that
state whenever outboundRequestBody changes in the outbound processing flow. Add
regression coverage for catalogs supplied through both tools and
additional_tools.
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Inline comments:
In `@tests/responses-undeclared-tool-guard.test.ts`:
- Line 627: Remove the duplicate const body declarations in each affected test
block around the response.json calls at the referenced locations, keeping
exactly one body declaration per test so the file compiles without duplicate
block-scoped identifiers.
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Inline comments:
In `@tests/responses-undeclared-tool-guard.test.ts`:
- Around line 132-167: Extend the hasExplicitWireToolCatalog tests to cover a
nested function specification with function.name, expecting true, and an empty
nested function object, expecting false. Add a forward-provider test with tools:
[] that verifies the upstream client-tool response is relayed through the
responses handling path.
Apply the same fix in `@src/server/responses-undeclared-tool-guard.ts` around
lines 114 - 141: Covers the existing nested function-name handling.
Apply the same fix in `@src/server/responses/core.ts` at line 3194: Covers the
existing authorization refresh on passthrough request rebuilds.
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@Ingwannu, the requested Spark provenance matrix is now covered on exact head |
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Summary
tools: []and Responses Liteadditional_tools.tools: [], while requiring non-empty catalogs to contain at least one readable client or hosted tool specification.Why
The guard previously activated only when at least one declared client-tool name was collected. That conflated a missing catalog with an explicit empty catalog, so a routed non-forward provider could return a client tool call even though the caller explicitly authorized no tools. Responses Lite can carry the same boundary inside an
additional_toolsinput item.Catalog presence also cannot be derived only from the normalized outbound body. xAI normalization may remove a final cached-only web-search declaration, while Spark compatibility may filter an unreadable future declaration down to
tools: []. The original readable caller catalog remains authoritative: supported deny-all and rewritten-away readable catalogs stay enforced, while normalization-created empty arrays do not invent a new restriction.Some client-executed Responses operations carry no ordinary function/custom name. Their response item type must be authorized independently, and a historical tool-search call may arm response-shape restoration without granting permission for a new search call in the current turn.
A locally expanded continuation also contains prior
additional_toolsitems. The guard now treats top-level tools and only the input suffix after_replayPrefixLenas current authority; historical catalogs cannot widen an explicit current deny-all boundary.Verification
7185ecc80ab59e6750c892d21fb605b2d0dd7433ff893ffeeed52077d4d0e7a891ee280c4ce7f1a41.4.0-canary.1(9fcdea80b): the undeclared-tool guard, GitHub Copilot stream contract, xAI web-search compatibility, opaque-rebuild recovery, tool-search repair, tool conformance, and Responses parser suites passed 165/165 with 529 assertions on the exact head.bun run typecheck: passed on the exact head.bun run privacy:scan: passed on the exact head.git diff --check origin/dev...HEAD: passed on the exact head.git range-diffconfirms all four commits are patch-equivalent (=) after the current-devrebase.Checklist
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