when use deepseek-r1 mode in mcp call return the error of 400 Bad Request

Bug description
when use deepseek-r1 mode in toolObjects call or mcp call both return the error of 400 Bad Request

Environment
spring ai version: 1.0.0
deepseek-r1:8b deeployed by ollama in localhost

error info
o.s.ai.chat.model.MessageAggregator : Aggregation Error
org.springframework.web.reactive.function.client.WebClientResponseException$BadRequest: 400 Bad Request from POST http://localhost:11434/v1/chat/completions
at org.springframework.web.reactive.function.client.WebClientResponseException.create(WebClientResponseException.java:321) ~[spring-webflux-6.2.6.jar:6.2.6]
Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
Error has been observed at the following site(s):
*__checkpoint ⇢ 400 BAD_REQUEST from POST http://localhost:11434/v1/chat/completions [DefaultWebClient]
Original Stack Trace:
at org.springframework.web.reactive.function.client.WebClientResponseException.create(WebClientResponseException.java:321) ~[spring-webflux-6.2.6.jar:6.2.6]
at org.springframework.web.reactive.function.client.DefaultClientResponse.lambda$createException$1(DefaultClientResponse.java:214) ~[spring-webflux-6.2.6.jar:6.2.6]
at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:106) ~[reactor-core-3.7.5.jar:3.7.5]
at reactor.core.publisher.FluxOnErrorReturn$ReturnSubscriber.onNext(FluxOnErrorReturn.java:162) ~[reactor-core-3.7.5.jar:3.7.5]
at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onNext(FluxDefaultIfEmpty.java:122) ~[reactor-core-3.7.5.jar:3.7.5]
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:129) ~[reactor-core-3.7.5.jar:3.7.5]
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onNext(FluxContextWrite.java:107) ~[reactor-core-3.7.5.jar:3.7.5]
at reactor.core.publisher.FluxMapFuseable$MapFuseableConditionalSubscriber.onNext(FluxMapFuseable.java:299) ~[reactor-core-3.7.5.jar:3.7.5]
at reactor.core.publisher.FluxFilterFuseable$FilterFuseableConditionalSubscriber.onNext(FluxFilterFuseable.java:337) ~[reactor-core-3.7.5.jar:3.7.5]
at reactor.core.publisher.Operators$BaseFluxToMonoOperator.completePossiblyEmpty(Operators.java:2096) ~[reactor-core-3.7.5.jar:3.7.5]
at reactor.core.publisher.MonoCollect$CollectSubscriber.onComplete(MonoCollect.java:145) ~[reactor-core-3.7.5.jar:3.7.5]
at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:144) ~[reactor-core-3.7.5.jar:3.7.5]
at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:260) ~[reactor-core-3.7.5.jar:3.7.5]
at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:144) ~[reactor-core-3.7.5.jar:3.7.5]
at reactor.netty.channel.FluxReceive.onInboundComplete(FluxReceive.java:413) ~[reactor-netty-core-1.2.5.jar:1.2.5]
at reactor.netty.channel.ChannelOperations.onInboundComplete(ChannelOperations.java:455) ~[reactor-netty-core-1.2.5.jar:1.2.5]
at reactor.netty.channel.ChannelOperations.terminate(ChannelOperations.java:509) ~[reactor-netty-core-1.2.5.jar:1.2.5]
at reactor.netty.http.client.HttpClientOperations.onInboundNext(HttpClientOperations.java:821) ~[reactor-netty-http-1.2.5.jar:1.2.5]
at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:115) ~[reactor-netty-core-1.2.5.jar:1.2.5]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:107) ~[netty-codec-4.1.119.Final.jar:4.1.119.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346) ~[netty-codec-4.1.119.Final.jar:4.1.119.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318) ~[netty-codec-4.1.119.Final.jar:4.1.119.Final]
at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1357) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:868) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:796) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:732) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:658) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562) ~[netty-transport-4.1.119.Final.jar:4.1.119.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:998) ~[netty-common-4.1.119.Final.jar:4.1.119.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.119.Final.jar:4.1.119.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.119.Final.jar:4.1.119.Final]
at java.base/java.lang.Thread.run(Thread.java:840) ~[na:na]

Start by reproducing both the toolObjects and MCP calls with deepseek-r1:8b through localhost:11434/v1/chat/completions, using the reported Spring AI 1.0.0 environment. Trace the request and response around the reported WebClient 400 error; done means both call types complete without a 400 Bad Request.