chore(main): release 0.2.3

[release-please]

🤖 I have created a release beep boop

0.2.3 (2026-08-21)

Features

• arcadedb: Add arcadedb source and tools (mcp-toolbox#​2961) (351de00) (91c1c62)
• cmd/internal,docs: Add warning log that prebuilt tools are for developer use (mcp-toolbox#​3451) (8cffcef) (91c1c62)
• groups: Add ttlMs and cacheScope customization to config (mcp-toolbox#​3805) (a5d4947) (91c1c62)
• migrate: Convert toolset to group kind during migration (mcp-toolbox#​3704) (0adeaa5) (91c1c62)
• prebuilt: Migrate skills-repo toolsets to kind: group with descriptions (mcp-toolbox#​3595) (b895b36) (91c1c62)
• release: Add digital signature to Toolbox binaries (mcp-toolbox#​3528) (3f0f0af) (91c1c62)
• server: Add /healthz endpoint for container health checks (mcp-toolbox#​3060) (d5aefbc) (91c1c62)
• server/mcp: Introduce generic client extension registry (mcp-toolbox#​3723) (016245c) (91c1c62)
• skill: Add review-prs skill for mcp-toolbox (mcp-toolbox#​3743) (5b7bacc) (91c1c62)
• skills: Add --group flag to generate a skill from one group (mcp-toolbox#​3585) (c1abd4f) (91c1c62)
• skills: Default --name to --group, --toolset, or single --prebuilt name (mcp-toolbox#​3586) (2b33b08) (91c1c62)
• skills: Make description optional during skills gen (mcp-toolbox#​3584) (d0a8f14) (91c1c62)
• source/bigquery: Add apiEndpoint field to override BigQuery API host (mcp-toolbox#​3437) (4da1600) (91c1c62)
• tools: Add cloud-sql-connect-gce for pg, mysql, mssql (mcp-toolbox#​3740) (ca58fa4) (91c1c62)
• Add groups support (mcp-toolbox#​3605) (e75ec3b) (91c1c62)
• Add quotaProject support for BigQuery and Looker conversational analytics (mcp-toolbox#​2610) (f3e7ca9) (91c1c62)
• Support MCP 2026 draft specs (mcp-toolbox#​3544) (d12eaa8) (91c1c62)
• Update draft specs to 2026-07-28 (mcp-toolbox#​3699) (cf128ff) (91c1c62)

Bug Fixes

• auth/mcp: Derive PRM URL from Toolbox URL (mcp-toolbox#​3765) (aa30842) (91c1c62)
• config: Ignore environment variables in YAML comments (mcp-toolbox#​3807) (79aa732), refs mcp-toolbox#​3793 (91c1c62)
• mcp: Return Tool execution error for invalid input param (mcp-toolbox#​3799) (8120197) (91c1c62)
• parameters: Report the offending value in array/map type errors (mcp-toolbox#​3512) (4034d6f) (91c1c62)
• parameters: Return an error instead of panicking on a non-string type field (mcp-toolbox#​3516) (66a0d53) (91c1c62)
• prebuilt/cloud-storage: Declare tool collections as groups (mcp-toolbox#​3764) (7d468be) (91c1c62)
• server: Avoid a nil-flusher panic in the SSE handler (mcp-toolbox#​3520) (947f42f) (91c1c62)
• server: Sort default toolset alphabetically for stable ordering (mcp-toolbox#​3539) (e5da24c) (91c1c62)
• server/mcp: Disallow client overriding URL bound parameters (mcp-toolbox#​3798) (f15a9c7) (91c1c62)
• tools/bigquery: Keep the provider error classification in bigquery-execute-sql (mcp-toolbox#​3738) (42570b8) (91c1c62)
• util: Convert exponent-form JSON numbers in ConvertNumbers (mcp-toolbox#​3730) (e9713ee) (91c1c62)
• Re-add name validation to tools name (mcp-toolbox#​3654) (944f6ce) (91c1c62)
• Re-add tool validation during startup (mcp-toolbox#​3705) (25ce953) (91c1c62)

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