Finance Database

    List the Finance Database's asset classes (which instruments exist and how they
    are classified, no prices), with their tool, size and filters.

    Use this first to see what is available. Each asset class has its own tool
    (e.g. `equities`) whose filters are listed here; `show_options` gives the
    valid values of each filter.

    Returns:
        str: Markdown table of asset classes.
    

    Find which instruments exist in the Finance Database by ticker, name or ISIN,
    across equities, ETFs, indices, currencies and cryptocurrencies at once, with
    their symbol, exchange and classification (no prices or financial data).

    Matches are case-insensitive substrings of the symbol or name (plus exact
    ISIN/CUSIP/FIGI matches), ordered by relevance: exact symbol first, then
    symbols and names starting with the query, primary listings and larger
    companies first. Each row says which asset class tool has the full record.

    Returns:
        str: Compact JSON with the matches and their total count per asset class.
    

    Show the valid values of a Finance Database filter (e.g. every sector or
    country) for an asset class.

    Use this before filtering an asset class tool so the exact values are known.
    Filters narrow the options to what actually occurs, e.g. the industries of
    the 'Health Care' sector in Germany.

    Returns:
        str: Compact JSON with the values and their total count.