fix(core): preserve the first terminal failure (#37705)

packages/ai/src/protocols/utils/tool-stream.ts

@@ -84,8 +84,6 @@ const toolCall = (route: string, tool: PendingTool, inputOverride?: string) => {
               id: tool.id,
               name: tool.name,
               raw,
-              message: error.reason.message,
-              providerMetadata: tool.providerMetadata,
             }),
           ),
     ),

packages/ai/src/schema/events.ts

@@ -150,14 +150,12 @@ export const ToolInputEnd = Schema.Struct({
 }).annotate({ identifier: "LLM.Event.ToolInputEnd" })
 export type ToolInputEnd = Schema.Schema.Type<typeof ToolInputEnd>
 
-/** A local tool call that could not be decoded. `raw` is diagnostic-only. */
+/** A local tool call whose final input could not be decoded. */
 export const ToolInputError = Schema.Struct({
   type: Schema.tag("tool-input-error"),
   id: ToolCallID,
   name: Schema.String,
   raw: Schema.String,
-  message: Schema.String,
-  providerMetadata: Schema.optional(ProviderMetadata),
 }).annotate({ identifier: "LLM.Event.ToolInputError" })
 export type ToolInputError = Schema.Schema.Type<typeof ToolInputError>