fix: return select query responses without SDK model parsing

[ChiragAgg5k]

A select query makes Appwrite return only the chosen attributes for each item in a list. The Console SDK still validates that response against the full model, where every attribute is required, so a successful call raises Unable to parse response into DeploymentList (Sentry MCP-12 and MCP-13, about 760 events, still firing on 1.0.3). The agent made a valid request and the server answered it, but the tool call reports a failure.

When a tool call's queries include a select, execute_registered_tool now replaces the service instance's _parse_response with a passthrough, so the SDK returns the response dict as-is. The server already serialises models back to JSON for the client, so the agent gets the same data it asked for. Calls without select are unchanged and still parse into typed models.

This is deliberately limited to select: that's the one case where partial responses are expected by design rather than a contract bug, so other parse failures keep surfacing in Sentry.

Tests: test_execute_registered_tool_returns_selected_attributes_untyped runs the real functions_list_deployments tool against a partial response. With select it returns the raw payload, and without select it still fails. It errors without the fix.

Verification: ruff check, black --check and pyright are clean, and python -m unittest discover -s tests/unit passes.

[hansi-codes]

🟢 Tier S · Ready to merge

The change is scoped to a fresh service instance per call, preserves existing error handling and serialization, and has a focused regression test; no concrete defects were found.

Calls whose queries include select now bypass SDK response-model parsing and return the raw payload through the existing result formatter. Calls without select retain typed parsing. A regression test covers partial deployment responses and verifies that parsing failures still surface without select.

Verdict	New comments	Fixed	Still open
✅ Approved	0	0	0

📂 Walkthrough · 2

File	Change
src/mcp_server_appwrite/server.py	Detect select queries and use a response passthrough on the per-call SDK service instance.
tests/unit/test_server.py	Verify partial deployment payloads succeed with select and still fail model parsing without it.

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[hansi-codes]

🟢 Tier S · Looks good to merge. Summary