新增原生工具调用数据结构与解析：SimpleAIClient.cs

AITool 增加 Schema 构造器与函数定义生成，所有工具补齐 GetParametersSchema()：AITool.cs 与 *.cs

Source/WulaFallenEmpire/EventSystem/AI/Tools/Tool_GetMapPawns.cs

@@ -13,6 +13,16 @@ namespace WulaFallenEmpire.EventSystem.AI.Tools
         public override string Description => "Scans the current map and lists pawns (including corpses). Supports filtering by relation (friendly/hostile/neutral), type (colonist/animal/mech/humanlike), and status (prisoner/slave/guest/wild/downed/dead).";
         public override string UsageSchema =>
             "{\"filter\":\"friendly,hostile,colonist\",\"includeDead\":true,\"maxResults\":50}";
+        public override Dictionary<string, object> GetParametersSchema()
+        {
+            var properties = new Dictionary<string, object>
+            {
+                ["filter"] = SchemaString("Comma-separated filters (friendly, hostile, colonist, etc.).", nullable: true),
+                ["includeDead"] = SchemaBoolean("Include corpses.", nullable: true),
+                ["maxResults"] = SchemaInteger("Max results to show.", nullable: true)
+            };
+            return SchemaObject(properties, RequiredList("filter", "includeDead", "maxResults"));
+        }
 
         private struct MapPawnEntry
         {