List Google Ads campaigns

Lists the campaigns in a Google Ads account with their state, campaign type, bidding strategy, daily budget (shared or not) and last-30-day spend, clicks and conversions. Use when: you need campaign ids for any other tool, or the user asks what campaigns exist, what they cost or which are running. Do not use when: the user wants performance over a specific period (use google_get_campaign_performance) or the contents of one campaign (use google_get_campaign_structure). Returns one row per campaign, most expensive first. Budgets are decimals in the account currency; a "shared" budget is used by more than one campaign, so changing it affects all of them. A budget_id from here can be given to google_create_search_campaign as budget_id, which puts the new campaign on that same budget instead of creating another. Google does not report when a campaign was created. The nearest signal is the Started column: a campaign starts on the day it was made unless someone set a later date. Campaign ids are not creation order — never rank them by id to find the newest, and if the user asks for "the latest one", say what you are going by and let them confirm. If you are unsure which account, campaign or period the user means, ask them — do not guess ids or dates.