feat: Return structured content from MCP tool responses#3
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dankelleher merged 6 commits intomainfrom Feb 11, 2026
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- Add etc/scripts/push-to-ecr.sh for building and pushing multi-arch images to dev/prod ECR - Add etc/scripts/promote.sh for promoting images from dev to prod ECR using crane - Pin Dockerfile base images to SHA digests for supply-chain security - Upgrade all dependencies to latest versions via uv lock --upgrade
Unquoted echo is intentional here — shell word splitting converts the tab-separated aws sts output to spaces so cut -d' ' works.
Tools now return raw Python data (dict/str) instead of pre-serialized List[TextContent]. FastMCP auto-generates both content (backward-compat text) and structuredContent (raw JSON object) from return type annotations, plus outputSchema in list_tools responses. - Add to_jsonable() helper for PostgreSQL type conversion via orjson - Refactor all 9 tools to return dict[str, Any] or str - Let exceptions propagate for FastMCP error handling - Update top_queries_calc to return list[dict] and raise on missing extension
…ured-content-tool-responses
Define TypedDict classes for all dict-returning tools so FastMCP
generates JSON schemas with explicit properties and types instead
of opaque {"type": "object", "additionalProperties": true}.
Uses only primitive types and dict[str, Any] to stay within MCP's
JSON Schema subset (no $defs/$ref/anyOf).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
dict[str, Any]orstr) instead of pre-serializedList[TextContent]content(backward-compat text) andstructuredContent(raw JSON object) from return type annotationsoutputSchemais now included inlist_toolsresponses for all toolsto_jsonable()helper for converting PostgreSQL types (Decimal, timedelta, bytes) to JSON-native Python typesisError: trueerror responsestop_queries_calcreturnslist[dict[str, Any]]and raisesValueErrorwhen pg_stat_statements is missing