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Messages such as 'Bitte öffne das Buchungsformular', 'ich möchte diesen Tarif', 'den nehme ich', 'book #2' or 'switch me to this', usually sent by the card's 'Jetzt buchen' but","inputSchema":{"type":"object","$schema":"http://json-schema.org/draft-07/schema#","required":["ref"],"properties":{"ref":{"type":"string","pattern":"^[a-z0-9]+\\.\\d+$"},"language":{"enum":["de","en"],"type":"string"}}},"title":"Open Booking Form","annotations":{"readOnlyHint":true,"untrustedContentHint":true},"logicalName":"start-booking","displayName":"Open Booking Form"},{"name":"compare-mobile-plans","description":"Compares and ranks US mobile phone plans, cheapest first, from a curated catalog of carrier and prepaid (MVNO) plans, each price checked on the provider's own page, by 12-month average cost per line, with any promo price shown alongside. The catalog is a selection, not the whole market; each result states how many plans and providers it covers and the oldest price-check date. 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