BEHAVIOR:
                            - If "id" is NOT provided → creates a new Google Ads text ad.
                            - If "id" IS provided → updates the existing Google Ads text ad with that ID.

                            CRITICAL — GOOGLE ADS CHARACTER LIMITS (HARD LIMITS — API WILL REJECT IF EXCEEDED)
                            - Headlines: MAXIMUM 30 characters each (minimum 3, maximum 15 headlines)
                            - Descriptions: MAXIMUM 90 characters each (2 to 4 descriptions). Each description string MUST be 90 characters or fewer. Count every letter, space, and punctuation mark. 90 is the absolute maximum.
                            - Ad name: MAXIMUM 50 characters

                            WARNING: DESCRIPTIONS — 90 CHARACTER HARD LIMIT — READ THIS CAREFULLY
                            THIS IS THE #1 MOST COMMON FAILURE MODE. DO NOT SKIP THIS SECTION.

                            - 90 characters is an ABSOLUTE, NON-NEGOTIABLE HARD CEILING.
                            - 91 characters = REJECTION. 100 characters = REJECTION. 89 characters = OK.
                            - "Characters" means EVERY character: letters, digits, spaces, punctuation,
                              apostrophes, hyphens, slashes, line breaks, and emoji code points. ALL count.
                            - There is NO grace, NO rounding, NO partial credit. The boundary is exact.
                            - The MCP schema enforces maxLength=90 — an over-length string is rejected
                              before your tool call even runs. The server ALSO truncates as a backstop,
                              meaning your over-length copy will be SILENTLY CUT MID-SENTENCE if it
                              somehow slips through. Either way, you will not get the description you wrote.
                            - This rule applies to EACH description independently. 4 descriptions of 80
                              chars each is fine. 1 description of 91 chars is NOT fine.
                            - Do NOT pad descriptions to "use the space." Shorter is always safer.
                            - Do NOT rely on the user noticing — you are responsible for compliance.

                            COMMON WAYS LLMs BLOW THE 90-CHAR LIMIT (avoid these):
                            - Writing a "complete sentence" without counting first.
                            - Adding a CTA at the end ("Sign up today!") that pushes past 90.
                            - Including the company name AND a tagline AND a benefit in one description.
                            - Using em dashes (—), ellipses (…), or smart quotes (" ") which still count
                              as characters and often appear longer than expected when counted.
                            - Trusting your "feel" for length — LLMs systematically underestimate by 5-15
                              characters. ALWAYS COUNT.

                            RECOMMENDED SAFETY MARGIN:
                            - Target 70-85 characters per description. This leaves headroom for sanitization
                              (smart-quote conversion, whitespace normalization) and avoids edge-case
                              rejections. 90 is the cliff — do not write to the cliff.

                            MANDATORY PRE-CALL VALIDATION — YOU MUST DO THIS BEFORE EVERY CALL:
                            1. Write out each headline and count its characters — each MUST be ≤ 30 characters
                            2. Write out each description and count its characters — each MUST be ≤ 90 characters (this is the most common error — descriptions MUST NOT exceed 90 characters)
                            3. For EACH description, do an explicit character count: len(description). If the
                               number is 91 or higher, REWRITE before calling. Do not "estimate" — count.
                            4. If any text exceeds the limit, rewrite and shorten it BEFORE calling the tool
                            5. Do NOT rely on the API to catch these errors — validate client-side first
                            6. When in doubt, make descriptions shorter. A 70-character description is better than a rejected 91-character one
                            7. If a user provides copy that is too long, shorten it yourself and proceed —
                               do NOT submit known-bad copy and hope for the best.

                            EXAMPLES — DESCRIPTIONS AT THE 90-CHAR BOUNDARY:
                            - "Shop the best deals online." (27 chars) SAFE
                            - "Free shipping on every order over fifty dollars. Sign up today!" (63 chars) SAFE
                            - "Discover our award-winning marketing platform built for B2B teams of every size today" (89 chars) SAFE — at the edge
                            - "Discover our award-winning marketing platform built for modern B2B teams of every size today" (94 chars) REJECTED — 4 over
                            - "Transform your B2B marketing strategy with AI-powered automation that drives real revenue today!" (98 chars) REJECTED — REWRITE

                            USAGE INSTRUCTIONS FOR LLM:
                            Use this tool when users want to:
                            - Create a new Google Ads text ad
                            - Update an existing Google Ads text ad (headlines, descriptions, or name)
                            - Set up a Google Ads responsive search ad with headlines and descriptions

                            WHEN TO USE:
                            - User asks "create a Google Ads ad"
                            - User wants to create a text ad for Google Ads
                            - User says "make a new Google ad with these headlines and descriptions"
                            - User wants to update the headlines or descriptions of an existing Google Ads ad
                            - User says "update Google ad 23149 with new headlines"

                            WHEN NOT TO USE:
                            - User wants to create a Facebook, LinkedIn, Instagram, or Reddit IMAGE ad → use create_update_image_ad
                            - User wants to create a Facebook, LinkedIn, Instagram, or Reddit VIDEO ad → use create_update_video_ad
                            - User wants to update a non-Google Ads ad → use create_update_image_ad or create_update_video_ad (whichever matches the ad's adType)

                            INPUT PARAMETERS:
                            - id: The ad ID (optional). If provided, the ad with this ID will be updated. If omitted, a new ad is created. This is the adLibraryId inside the creatives of the google channel in campaign response.
                            - name: The name/label for the ad (required, max 50 characters)
                            - headlines: Array of headline text strings (required, minimum 3, maximum 15 headlines, each STRICT MAX 30 CHARACTERS)
                            - descriptions: Array of description text strings (required, 2 to 4 descriptions, each STRICT MAX 90 CHARACTERS — count characters carefully, this is the most common validation failure)

                            EXAMPLE USAGE (Create):
                            create_update_google_ads_ad(
                                name="My Google Ad Q1 2025",
                                headlines=["Buy Now", "Best Deals", "Free Shipping"],
                                descriptions=["Shop the best deals online.", "Free shipping on all orders."]
                            )

                            EXAMPLE USAGE (Update):
                            create_update_google_ads_ad(
                                id=23149,
                                name="My Google Ad Q1 2025 Updated",
                                headlines=["Updated Headline 1", "Updated Headline 2", "Updated Headline 3"],
                                descriptions=["Updated description 1.", "Updated description 2."]
                            )