feat(investigations): refine report authoring and replay flushing

docs/mcp-analysis-tools.md

@@ -12,7 +12,7 @@ Agent 原生工具统一使用 `mcp_tjwater_` 前缀。Server目录共67项：42
 | `run_leakage_identification` | SCADA压力约束下的DMA漏损分配估计；需总漏损量依据 | `burst.run` + `scada.view` |
 | `run_contaminant_simulation` | 假设源正向传播；可选按全网全时段浓度汇总累计范围、首个超阈值报告时刻与峰值，详见[污染流程](water-pollution-response-workflow.md)；与工单并行，不承担反演或安全判定 | `simulation.run` + `scada.view` |
 | `analyze_valve_closure` | 给定关阀组合的水力影响 | `simulation.run` + `scada.view` |
-| `analyze_flushing` | 指定排放节点和流量的冲洗水力影响；不证明消毒合格 | `simulation.run` + `scada.view` |
+| `analyze_flushing` | 指定排放点、流量与互斥的 `opened_valves` / `closed_valves`，评估独立冲洗水力情景并保存阀态和预计排放量；不证明污染清除或水质合格 | `simulation.run` + `scada.view` |
 | `analyze_pressure_regulation` | 给定调泵序列、水箱初始水位的压力影响；不自动优化调度 | `simulation.run` + `scada.view` |
 | `optimize_sensor_placement` | 灵敏度或K-means压力监测点建议；不保存正式布点方案 | `optimization.run`，项目成员角色 |