[Server] Use getDescription to get all descriptions. (#188)

* Remove `getSummary` method and update descriptions in snapshots and code

* Add changelog entry

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Co-authored-by: Christopher Hertel <mail@christopher-hertel.de>

tests/Inspector/Http/snapshots/HttpComplexToolSchemaTest-tools_list.json

@@ -2,7 +2,7 @@
   "tools": [
     {
       "name": "schedule_event",
-      "description": "Schedules a new event.",
+      "description": "Schedules a new event.\n\nThe inputSchema for this tool will reflect all parameter types and defaults.",
       "inputSchema": {
         "type": "object",
         "properties": {