Add description for get_lineage Too #8233
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hey @Muizzkolapo , thanks for opening this up! i'll close this pr up since i notice the pr dbt-labs/dbt-mcp#484 is closed. please let us know if we need to reopen it or if it was a mistake! |
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@mirnawong1 no worries! new one is here dbt-labs/dbt-mcp#502, Just waiting for Devon's approval. I will raise a new pr on merge. |
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…502) ## Summary A User building a catalog-like experience with dbt and Snowflake via Claude Desktop requested full lineage capabilities #110: > "Get the full lineage of a model, not only its children/parents. To parse the full lineage with the official MCP it would require quite a few calls to the tool to parse through all layers, which would be nice to get the server doing async instead providing the full list as a return." --- ## What Changed Added a new `get_lineage` tool that enables efficient lineage traversal across all dbt resource types using the Discovery API's `lineage()` endpoint. ### Key Implementation Details **Query Approach:** - Uses Discovery API's `lineage()` endpoint to fetch the entire lineage graph in a single API call - Requests minimal fields: `name`, `uniqueId`, `resourceType`, and `parentIds` - Pre-builds a children adjacency map for descendant lookups **Why Not Use Selector Syntax?** The selector parameters (`select: "model+"`, `exclude: "test_*"`) does not seem to be available in the public API: ## Test Case <img width="1264" height="783" alt="image" src="https://github.com/user-attachments/assets/ee045546-9979-48e2-b31a-7780f85c81e1" /> Search for any exposures: <img width="1264" height="833" alt="image" src="https://github.com/user-attachments/assets/8ba63f3d-cc99-4e7f-a63a-811881a6f847" /> ## Why Implementing to close #110 ## Related Issues <!-- Link any related issues using #issue_number --> Closes ##110 Related to ##110 ## Checklist - [x] I have performed a self-review of my code - [x] I have made corresponding changes to the documentation (in https://github.com/dbt-labs/docs.getdbt.com) if required -- Mention it here dbt-labs/docs.getdbt.com#8233 - [x] I have added tests that prove my fix is effective or that my feature works - [x] New and existing unit tests pass locally with my changes ## Additional Notes <!-- Any additional information that would be helpful for reviewers --> ## Related Issues <!-- Link any related issues using #issue_number --> Closes # Related to # ## Checklist - [x] I have performed a self-review of my code - [x] I have made corresponding changes to the documentation (in https://github.com/dbt-labs/docs.getdbt.com) if required -- Mention it here dbt-labs/docs.getdbt.com#8233 - [x] I have added tests that prove my fix is effective or that my feature works - [x] New and existing unit tests pass locally with my changes ## Additional Notes <!-- Any additional information that would be helpful for reviewers --> --------- Co-authored-by: Devon Fulcher <[email protected]>
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What are you changing in this pull request and why?
This pr adds descriptions for a new mcp tools, get_lineage. The change is related to hhttps://github.com/dbt-labs/dbt-mcp/pull/484
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