refactor(mcp): split hyperdx_query into 5 display-type-specific tools

.changeset/split-query-tools.md

@@ -0,0 +1,16 @@
+---
+'@hyperdx/api': patch
+---
+
+refactor(mcp): split hyperdx_query into 5 display-type-specific tools
+
+Replace the monolithic `hyperdx_query` tool with five narrow tools:
+- `hyperdx_timeseries` (line + stacked_bar)
+- `hyperdx_table` (table + number + pie, with shape auto-upgrade)
+- `hyperdx_search` (raw event browsing)
+- `hyperdx_event_patterns` (Drain pattern mining)
+- `hyperdx_sql` (raw ClickHouse SQL)
+
+Each tool's schema contains only its relevant parameters — no displayType
+discriminator, no fields from other modes, no conditional required fields.
+`hyperdx_query` is removed from the tool surface.

MCP.md

@@ -109,7 +109,11 @@ with:
 | Tool                          | Description                                                                                  |
 | ----------------------------- | -------------------------------------------------------------------------------------------- |
 | `hyperdx_list_sources`        | List all data sources and database connections, including column schemas and attribute keys   |
-| `hyperdx_query`               | Query observability data (logs, metrics, traces) using builder mode, search mode, or raw SQL |
+| `hyperdx_timeseries`          | Plot metrics over time as a line or stacked bar chart                                        |
+| `hyperdx_table`               | Compute aggregated metrics as a table, single number, or pie chart                           |
+| `hyperdx_search`              | Browse individual log, event, or trace rows                                                  |
+| `hyperdx_event_patterns`      | Discover the most common log messages and event patterns using Drain clustering               |
+| `hyperdx_sql`                 | Execute raw ClickHouse SQL for advanced queries (JOINs, CTEs, sub-queries)                   |
 | `hyperdx_get_dashboard`       | List all dashboards or get full detail for a specific dashboard                              |
 | `hyperdx_save_dashboard`      | Create or update a dashboard with tiles (charts, tables, numbers, search, markdown)          |
 | `hyperdx_delete_dashboard`    | Permanently delete a dashboard and its attached alerts                                       |