feat(mcp): add trace waterfall and breakdown tools

.changeset/mcp-trace-tools.md

@@ -0,0 +1,14 @@
+---
+'@hyperdx/api': patch
+---
+
+feat(mcp): add trace waterfall and breakdown tools
+
+Add `hyperdx_trace_waterfall` — fetch all spans in a single trace as a
+parent/child waterfall tree with optional correlated logs. Supports
+auto-pick by slowest, first error, or most recent trace.
+
+Add `hyperdx_trace_top_time_consuming_operations` — aggregate breakdown
+of child operations consuming the most cumulative time across traces
+matching a parent-span filter. Same algorithm as the in-app "Top Most
+Time Consuming Operations" chart.

MCP.md

@@ -123,4 +123,6 @@ with:
 | `hyperdx_save_saved_search`   | Create or update a saved search (reusable query against a data source)                       |
 | `hyperdx_get_alert`           | List alerts (summary) or get full detail with evaluation history; filter by state             |
 | `hyperdx_save_alert`          | Create a new alert or update an existing one                                                 |
+| `hyperdx_trace_waterfall`     | Fetch all spans in a single trace as a parent/child waterfall tree with optional correlated logs |
+| `hyperdx_trace_top_time_consuming_operations` | Aggregate breakdown of child operations by cumulative time across matching parent traces |
 | `hyperdx_get_webhook`         | List available webhook destinations for use as alert notification channels                    |