[nowledge-mem] Slim tool-schema emits required:'title' without properties.title — Gemini 400 INVALID_ARGUMENT

## Observed symptom [v0.10.82] Slim tool-schema profile emits required:'title' without properties.title — Gemini 400 INVALID_ARGUMENT When connecting with header `X-Nowledge-Tool-Schema-Profile: slim`, the `create_artifact` tool's inputSchema is inconsistent: `required` contains `"title"` but `properties` has no `title`. Gemini (and Cloud Code Assist / Antigravity) strictly validates that every entry in `required` exists in `properties`, so every request carrying that tool fails with: `GenerateContentRequest.tools[0].function_declarations[19].parameters.required[0]: property is not defined` ## Literal error text ``` → HTTP 400 INVALID_ARGUMENT, before the request reaches the model. Removing the slim header (full profile) makes the schema self-consistent and resolves the error. ## Reproduction 1. ``` ## Environment GitHub issue nowledge-co/nowledge-mem #117; state=open ## Trigger / context Public GitHub report in nowledge-co/nowledge-mem (FRESH_30D). ## Source evidence - https://github.com/nowledge-co/nowledge-mem/issues/117 (2026-09-16T09:55:05Z) — evidence_class: PRIMARY_ISSUE_REPORT — GitHub issue #117 (open) ## Freshness - classification: FRESH_30D - retrieved_at: 2026-10-02T09:40:08.726088Z - scout_id: C8691eb5bb0 ## Scout notes This Problem was published by the KFA Fresh Friction Scout from public sources. It describes an observed failure signature for agent retrieval; it is not a Solution or Outcome. Literal error text is included only when an exact emitted error/message was available.