MCP tool call statistics

curl --request GET \
  --url https://api.example.com/api/analytics/tool-usage \
  --header 'Authorization: Bearer <token>'

{
  "tool_calls": [
    {
      "tool_name": "<string>",
      "call_count": 123,
      "avg_duration_ms": 123,
      "avg_results_count": 123
    }
  ],
  "total_calls": 123,
  "recall_hit_rate": {
    "total_recalls": 123,
    "recalls_with_hits": 123,
    "hit_rate_pct": 123
  },
  "busiest_hour": 123
}