chore(skills): drop OpenAI o-series from llm-tool-best-practices scope

skills/llm-tool-best-practices/LLM_TOOL_BEST_PRACTICES.md

@@ -138,7 +138,7 @@
 - **`tool_choice`:** Default is `auto`. Use `required` to force a call, or named function to force a specific one. Use `allowed_tools` to restrict available tools per turn without breaking prompt cache.
 - **Tool search (`defer_loading: true`):** For large ecosystems, defer rarely-used tools. Let the model search and load them on demand — keeps initial context small and accurate.
 - **Namespaces:** Group related tools using the `namespace` type with a `description`. Helps model choose between overlapping domains (e.g., `crm` vs `billing`).
-- **Reasoning models (o4-mini, GPT-5, etc.):** Do NOT add examples in descriptions — this can hurt reasoning model performance. Pass reasoning items back with tool call outputs (required).
+- **Reasoning models (o-series):** Out of scope — not targeted by this workspace.
 - **Token awareness:** Function definitions are injected into the system prompt and billed as input tokens. Shorten descriptions where possible; use tool search to defer heavy schemas.
 - **`additionalProperties: false`** is required for strict mode — always add it.
 - For code generation or high-stakes outputs: keep a human-in-the-loop review step.
@@ -162,7 +162,7 @@
 | Examples in tool def | `input_examples` array (recommended) | Inline in description (avoid for reasoning models) |
 | Tool response format | Flexible; test JSON/XML/Markdown | String preferred; JSON/error codes acceptable |
 | Max tools in context | No hard limit; keep focused | Soft limit ~20; use tool search beyond that |
-| Best model for complex tools | Claude Opus | GPT-4.1 / GPT-5 (not nano for parallel calls) |
+| Best model for complex tools | Claude Opus | GPT-4.1 / GPT-5 |
 | Safety tooling | Built-in thinking/CoT, strict tool use | Moderation API, safety_identifier, HITL |
 | Parallel calls | Default on; managed by model | Default on; disable with `parallel_tool_calls: false` |
 | Deferred tools | N/A (use fewer tools instead) | `defer_loading: true` + tool search |