Every recorded web_search and web_view call in production carried a scalar
(20 of 20, 8 of 8), including sessions where three searches on one topic went
out one after another. The recommendation was already written in three
places — the parameter description, the tool docstring and the server's
summary line — so prose was not the problem: `str | list[str]` renders as
`anyOf: [string, array]`, and the model took the first branch.

The parameter is now a pure array with minItems/maxItems and an examples
entry. A BeforeValidator folds a bare "query": "…" into a one-item list, so a
laxer caller still works; the cap rides in json_schema_extra rather than
pydantic's max_length, so four queries reach the code that runs three and
names the rest instead of failing validation.

Brave is gone on both paths: the keyed Search API (signup answers 403, so a
third backend that can never be enabled) and the ddgs engine of the same name,
which answers nothing from this host. The chain is SearXNG -> ddgs.

The persona's parallelism rule now separates "several items in one call" from
"several calls in one message" — it used to read "when the profile allows
parallel tool calls", which the model could only read as "not here".