codeant-ai-for-open-source[bot] commented on PR #38277:
URL: https://github.com/apache/superset/pull/38277#issuecomment-4030144124
## **Sequence Diagram**
This diagram shows how MCP list tools now apply owner/favorite filters via
DAO subqueries with corrected 1-based pagination, and how chart preview
requests return an explore link URL instead of an error.
```mermaid
sequenceDiagram
participant Client
participant MCPService
participant DashboardDAO
participant Database
participant ChartEngine
Client->>MCPService: List dashboards (owner and favorite filters, page 1)
MCPService->>DashboardDAO: List(page=0, column_operators with
owner/favorite)
DashboardDAO->>Database: Query dashboards via owner M2M and favorite
subquery
Database-->>DashboardDAO: Matching dashboards and total_count
DashboardDAO-->>MCPService: Dashboards and 0-based page info
MCPService-->>Client: Dashboards with 1-based page and pagination
metadata
Client->>MCPService: Get chart preview (format=url)
MCPService->>ChartEngine: Load chart and build explore link
ChartEngine-->>MCPService: Explore link for chart
MCPService-->>Client: Preview result containing explore URL
```
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