Added value: +"Arguments for get_my_next_session."

Added value: +"Exact MYOPL league slug from its link, for a league the signed-in account belongs to."

Previous value: -nullNew value: +{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "description": "MYOPL structured response for get_my_next_session.",
+  "oneOf": [
+    {
+      "additionalProperties": false,
+      "properties": {
+        "date": {
+          "description": "Next session date as displayed by MYOPL.",
+          "type": "string"
+        },
+        "league": {
+          "description": "MYOPL league slug.",
+          "type": "string"
+        },
+        "league_name": {
+          "description": "League display name.",
+          "type": "string"
+        },
+        "time": {
+          "description": "Next session time as displayed by MYOPL.",
+          "type": "string"
+        }
+      },
+      "required": [
+        "league",
+        "league_name",
+        "date",
+        "time"
+      ],
+      "type": "object"
+    },
+    {
+      "additionalProperties": false,
+      "properties": {
+        "error": {
+          "description": "Tool execution or argument error; the enclosing result has isError set to true.",
+          "type": "string"
+        }
+      },
+      "required": [
+        "error"
+      ],
+      "type": "object"
+    }
+  ],
+  "type": "object"
+}