Bug type

Behavior bug (incorrect output/state without crash)

Beta release blocker

No

Summary

🐛 Bug 描述

严重程度: 🔴 Critical - 完全阻断所有功能

Kimi/k2p5 模型在工具调用时，所有参数都丢失，arguments 对象变为空 {}。这导致 所有工具调用完全失效（exec, read, sessions_spawn, edit 等）。

🌍 环境信息

• OpenClaw 版本: (请填写)
• 运行时模型: kimi/k2p5
• 默认模型: kimi/k2p5
• 操作系统: macOS Darwin 25.2.0 (arm64)
• Node.js: v22.22.0
• API: anthropic-messages
• Shell: zsh

🔄 复现步骤

1. 启动 k2p5 会话

openclaw chat --model kimi/k2p5

### Steps to reproduce

exec({"command": "pwd"})
read({"path": "/Users/yy/projects/file.ts"})
sessions_spawn({"task": "example task"})
edit({"file": "test.txt", "oldString": "a", "newString": "b"})

### Expected behavior

{"type":"toolCall","name":"exec","arguments":{"command":"pwd"}}

### Actual behavior

{"type":"toolCall","name":"exec","arguments":{}}

### OpenClaw version

2026.3.28

### Operating system

macOS Tahoe Version26.2

### Install method

npm global

### Model

kimi code k2p5

### Provider / routing chain

openclaw -> cloudflare -> ai - gateway -> kimi code k2p5

### Additional provider/model setup details

_No response_

### Logs, screenshots, and evidence

```shell

Impact and severity

受影响用户
• 所有使用 kimi/k2p5 的会话 完全无法工作
• 子代理同样受影响

📝 证据日志
原始会话日志片段（来自 transcript）
{"type":"toolCall","id":"tool_pR51wvCltla9rNvje23CQkUQ","name":"exec","arguments":{}}
{"type":"toolResult","toolCallId":"tool_pR51wvCltla9rNvje23CQkUQ","toolName":"exec","content":[{
"type":"text",
"text":"Validation failed for tool "exec":\n - command: must have required property 'command'\n\nReceived arguments:\n{}"
}]}
子代理执行失败（10分钟超时，335k tokens 浪费）
Stats: runtime 10m0s • tokens 335.0k (in 332.9k / out 2.2k)
Status: timed out

Result:
Validation failed for tool "exec":

• command: must have required property 'command'
  Received arguments:
  {}

根本原因分析：
问题发生在 模型生成 tool call 后 到 执行前 的参数序列化/转换层：

1. ✅ 模型正确生成了工具调用意图
2. ❌ 但 arguments 对象在传递过程中变成空 {}
3. ❌ 导致所有工具验证失败

疑似问题位置：
• OpenClaw 的 Kimi/k2p5 适配器
• Anthropic Messages API 格式转换层

Additional information

验证过的解决方案