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fix: prevent regular tool_search functions from being replayed as native tool search #17446

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fix: prevent regular tool_search functions from being replayed as native tool search #17446

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416d0bb
reproduction (reproduced)
lgrammel Jul 17, 2026
a660880
fix #17402
lgrammel Jul 17, 2026
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5 changes: 5 additions & 0 deletions .changeset/flat-carpets-listen.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
"@ai-sdk/openai": patch
---

Fix Responses API history serialization for function tools named `tool_search`.
56 changes: 56 additions & 0 deletions packages/openai/src/responses/convert-to-openai-responses-input.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1316,6 +1316,62 @@ describe('convertToOpenAIResponsesInput', () => {
]);
});

it('should convert a function named tool_search as a function call and output', async () => {
const result = await convertToOpenAIResponsesInput({
toolNameMapping: testToolNameMapping,
hasToolSearchTool: false,
prompt: [
{
role: 'assistant',
content: [
{
type: 'tool-call',
toolCallId: 'call_123',
toolName: 'tool_search',
input: {
query: 'synthetic query',
limit: 10,
},
},
],
},
{
role: 'tool',
content: [
{
type: 'tool-result',
toolCallId: 'call_123',
toolName: 'tool_search',
output: {
type: 'json',
value: { tools: [] },
},
},
],
},
],
systemMessageMode: 'system',
providerOptionsName: 'openai',
store: true,
});

expect(result.input).toMatchInlineSnapshot(`
[
{
"arguments": "{"query":"synthetic query","limit":10}",
"call_id": "call_123",
"name": "tool_search",
"type": "function_call",
},
{
"call_id": "call_123",
"output": "{"tools":[]}",
"type": "function_call_output",
},
]
`);
});

it('should default missing tool call input to an empty object', async () => {
const result = await convertToOpenAIResponsesInput({
toolNameMapping: testToolNameMapping,
Expand Down
15 changes: 12 additions & 3 deletions packages/openai/src/responses/convert-to-openai-responses-input.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -79,6 +79,7 @@ export async function convertToOpenAIResponsesInput({
hasShellTool = false,
hasApplyPatchTool = false,
hasComputerTool = false,
hasToolSearchTool = true,
customProviderToolNames,
}: {
prompt: LanguageModelV4Prompt;
Expand All @@ -95,6 +96,7 @@ export async function convertToOpenAIResponsesInput({
hasShellTool?: boolean;
hasApplyPatchTool?: boolean;
hasComputerTool?: boolean;
hasToolSearchTool?: boolean;
customProviderToolNames?: Set<string>;
}): Promise<{
input: OpenAIResponsesInput;
Expand Down Expand Up @@ -359,7 +361,7 @@ export async function convertToOpenAIResponsesInput({
part.toolName,
);

if (resolvedToolName === 'tool_search') {
if (hasToolSearchTool && resolvedToolName === 'tool_search') {
if (store && id != null) {
input.push({ type: 'item_reference', id });
break;
Expand Down Expand Up @@ -580,7 +582,10 @@ export async function convertToOpenAIResponsesInput({
part.toolName,
);

if (resolvedResultToolName === 'tool_search') {
if (
hasToolSearchTool &&
resolvedResultToolName === 'tool_search'
) {
const itemId =
(
part.providerOptions?.[providerOptionsName] as
Expand Down Expand Up @@ -841,7 +846,11 @@ export async function convertToOpenAIResponsesInput({
part.toolName,
);

if (resolvedToolName === 'tool_search' && output.type === 'json') {
if (
hasToolSearchTool &&
resolvedToolName === 'tool_search' &&
output.type === 'json'
) {
const parsedOutput = await validateTypes({
value: output.value,
schema: toolSearchOutputSchema,
Expand Down
1 change: 1 addition & 0 deletions packages/openai/src/responses/openai-responses-language-model.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -349,6 +349,7 @@ export class OpenAIResponsesLanguageModel implements LanguageModelV4 {
hasShellTool: hasOpenAITool('openai.shell'),
hasApplyPatchTool: hasOpenAITool('openai.apply_patch'),
hasComputerTool: hasOpenAITool('openai.computer'),
hasToolSearchTool: hasOpenAITool('openai.tool_search'),
customProviderToolNames:
customProviderToolNames.size > 0
? customProviderToolNames
Expand Down