Amin Ghadersohi 5542a2f3b1 fix(mcp): clarify request wrapper pattern in list_datasets, list_charts, list_dashboards ...

LLMs consistently passed flat kwargs (search, page, page_size) to list_*
tools instead of wrapping them in the required `request` object, causing
pydantic validation errors.

- Add docstring usage examples to list_datasets, list_charts, and
  list_dashboards showing the correct `request={...}` call shape and
  explicitly warning against flat kwargs
- Enumerate valid filter columns directly in DatasetFilter, ChartFilter,
  and DashboardFilter field descriptions (e.g. `created_by_fk` is not a
  valid dataset filter col)
- Add TestListDatasetsRequestWrapper tests covering: correct request
  wrapper usage, default values, valid/invalid filter col validation,
  and the flat-kwargs rejection scenario from story #105712
- Allow E501 in list_*.py tool files (docstring examples need full request
  shapes to be instructive)

2026-05-07 16:55:35 +00:00

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