Release / 4 Jun 2026

MCP Toolbox for Databases v1.4.0

Trace data lineage through configured tools.

Before you upgrade to v1.4.0

1 to fix

Return a matching issuer and `active: true` in opaque-token introspection; MCP-only introspection and scope fields require `mcpEnabled`.

Action requiredAuthenticate MCP access with a generic authorization service and Protected Resource Metadata.Affects: Generic authorization-service deployments.Inferred

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googleapis/mcp-toolbox/blob/v1.4.0/internal/auth/generic/generic.go

What changed in v1.4.0

Adds Data Lineage tools and Windows ARM64 support; generic token validation is stricter.

v1.4.0; use the release binaries or container image and configure the required source credentials.

New things you can do

Inspect data lineage with Google Cloud Data Lineage tools.

Added

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googleapis/mcp-toolbox/releases/tag/v1.4.0

Run Toolbox using a native Windows ARM64 binary.

Added

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googleapis/mcp-toolbox/releases/tag/v1.4.0

Fixed and improved

Start with unsupported tool definitions skipped using `--ignore-unknown-tools`.

ImprovedDefine parameterized database tools in YAML and share them with agents through MCP or Toolbox SDKs.

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googleapis/mcp-toolbox/releases/tag/v1.4.0

Use the remaining Cloud SQL PostgreSQL vector-assist tools.

ImprovedUse vector-assist tools in Cloud SQL PostgreSQL.

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googleapis/mcp-toolbox/releases/tag/v1.4.0

Search the catalog with `spanner-search-catalog`.

ImprovedRun SQL queries against Spanner databases.

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googleapis/mcp-toolbox/releases/tag/v1.4.0

Enforce allowed datasets in forecast queries and validate identifier parameters.

Now worksQuery BigQuery data and inspect dataset and table metadata.

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googleapis/mcp-toolbox/releases/tag/v1.4.0

Execute prebuilt Oracle queries without trailing-semicolon failures.

Now worksRun SQL queries against Oracle through configured tools.

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googleapis/mcp-toolbox/releases/tag/v1.4.0

Seeded by @iluxav with Codex, from the release's public sources. Each change links to its evidence.