CRITICAL: PICK THE TOOL BY THE CAMPAIGN'S STRUCTURE (not by user phrasing):
              • Native / Channel-First / Platform-First / N×N×N campaign → THIS tool (`add_and_edit_native_campaign_elements`).
              • Precision Optimization / 1×1×1 / METADATA campaign → `add_and_edit_campaign_elements`.
            Both tools guard: call THIS tool on a Precision/METADATA campaign and it returns an error telling you to use `add_and_edit_campaign_elements`, and vice-versa. So if you guess wrong, the error tells you the right one — no silent mis-write. If you don't know the structure, check the campaign first (its channels' structureType) or just try and follow the redirect.

            WHAT THIS TOOL DOES:
            - EDIT campaign-level fields: name, budgetGroup, startDate, endDate (same smart/partial semantics as the flat tool — only pushed when different / supplied).
            - ADD new containers: each channel's `containers[]` APPENDS new WizNativeAdContainers (one audience × an `ad_offers` list of {ad, offer} pairs each, same shape as `create_native_structure_campaign`). Existing containers are PRESERVED — the channel's current container list is re-POSTed with the new ones appended.
            - ADD bare target groups: each channel's optional `target_groups[]` (names) attaches targeting groups to the native channel without a full container (places targetingGroupId on a reused/appended ad-less container).
            - ATTACH negative keyword lists (Google Ads / Microsoft Ads only): the search channel block's optional `negative_keyword_lists[]` (names of EXISTING lists) attaches them channel-wide — valid with or without new containers. Names inside `containers[].negative_keyword_lists` are unioned in and applied at the same channel level. A name that doesn't resolve on the channel is reported in `errors[]`, never silently skipped.
            - EDIT existing containers (PER CONTAINER): each channel's optional `modify_containers[]` targets an existing container by `name` and, within it, deletes specific Ad—Offer rows (`remove_ads`), clears an offer from one ad while keeping it on the OTHER ads (`clear_offers_on_ads`), removes this container's audience / targeting group / keywords / exclusion (`remove_audience` / `remove_target_group` / `remove_keywords` / `remove_exclude_audience`), or deletes the whole container (`delete_container`). This is the surgical counterpart to the channel-wide remove_* tools — use it when an audience/offer/ad is shared across containers and you only want to touch one. Removing a group clears it on that one container; a group reused by other containers stays alive for them.

            WHAT THIS TOOL DOES NOT DO:
            - It does not switch a campaign's structure (that's fixed at creation).
            - For a change that spans ALL ads (remove an offer/ad everywhere it appears on the channel), use the channel-wide removal tools (remove_offers_from_campaign / remove_ad_from_campaign / remove_audiences_from_campaign / remove_target_groups_from_campaign / remove_keywords_from_campaign); `modify_containers` is only for a specific container/row.

            CONTAINER RULES (same as create_native_structure_campaign):
            - Each container is one audience × a LIST of (ad, offer) pairs (`ad_offers`, 1+). Group several ads/offers under one audience by adding pairs — e.g. 3 ads on the same offer = 3 pairs that repeat the same `offer` id. Send two containers only to run the audience as two separate ad-sets.
            - `audience` / `exclude_audience` / `target_group` are NAMES (resolved server-side); the `ad` / `offer` inside each `ad_offers` pair are integer IDs.
            - Audience names are resolved BEFORE anything is created: a container whose `audience` cannot be resolved is dropped with an error in `errors[]` that states whether retrying can help ("may still be matching") or not ("not available on this channel"); no keyword group or other element is left behind for a dropped container.
            - `audience` is REQUIRED for LinkedIn/Facebook/Instagram/Reddit; OPTIONAL for Google/Microsoft search containers (keyword-only is valid — provide `keywords`/`keyword_ids` instead).
            - Offer–channel lock still applies: a Lead Gen offer must be locked to the container's channel (LinkedIn→LINKEDIN, etc.); Google takes Landing Page offers only; Landing Page offers are universal.

            RESPONSE: same top-level shape as `add_and_edit_campaign_elements` (success, campaign_id, changes {renamed, budget_group_reassigned, schedule_updated}, added_summary per channel {containers, target_groups, negative_keyword_lists, and — when modify_containers is used — ads_removed, offers_cleared, containers_deleted, audiences_removed, target_groups_removed, keywords_removed, excludes_removed}, optimization_group, campaign_url, full_response). On partial failures, success=false plus `errors[]`; the rest of the edit still proceeds.

            EXAMPLE (append a LinkedIn container + rename):
            add_and_edit_native_campaign_elements(campaign_data={
                "campaignId": 159490,
                "name": "Q3_ABM_Native_v2",
                "linkedin": {"containers": [
                    {"name": "VPs > Demo > Form", "audience": "VPs - NA", "ad_offers": [{"ad": 156502, "offer": 57538}]}
                ]}
            })

            EXAMPLE (append a Google keyword-only container + bare target group):
            add_and_edit_native_campaign_elements(campaign_data={
                "campaignId": 159490,
                "google": {
                    "containers": [
                        {"name": "Incident Response", "ad_offers": [{"ad": 210804, "offer": 67269}],
                         "keywords": ["incident response platform"], "negative_keyword_lists": ["Competitor Brands"]}
                    ],
                    "target_groups": ["Tech Decision Makers"]
                }
            })

            EXAMPLE (ROW-LEVEL: drop the offer from ONE ad in a container, keep it on the other ads):
            add_and_edit_native_campaign_elements(campaign_data={
                "campaignId": 159490,
                "facebook": {"modify_containers": [
                    {"container": "ICP > 3 creatives > TOF offer",
                     "clear_offers_on_ads": ["Ungated-AI-in-Finance-v2-vert_FB"]}
                ]}
            })

            EXAMPLE (PER-CONTAINER: delete one Ad—Offer row in one container; delete a whole other container):
            add_and_edit_native_campaign_elements(campaign_data={
                "campaignId": 159490,
                "linkedin": {"modify_containers": [
                    {"container": "VPs > Demo > Form", "remove_ads": ["Old Creative A"]},
                    {"container": "Retired ad-set", "delete_container": True}
                ]}
            })

            EXAMPLE (PER-CONTAINER: drop a reused audience from ONE container, keep it on the others):
            add_and_edit_native_campaign_elements(campaign_data={
                "campaignId": 159490,
                "facebook": {"modify_containers": [
                    {"container": "ICP - A2", "remove_audience": True}
                ]}
            })