a0cd2c5338
When tool_preview_length is 0 (default for platforms without a tier default, like Session), verbose mode was truncating args JSON to 200 characters. Since the user explicitly opted into verbose mode, they expect full tool call detail — the 200-char cap defeated the purpose. Now: tool_preview_length=0 means no truncation in verbose mode. Positive values still cap as before. Platform message-length limits handle overflow naturally.