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google_ads_device_analyze

Compare Google Ads performance across desktop, mobile, and tablet to identify wasted spend, zero-conversion devices, and weak mobile CTR. Get device-level metrics and actionable insights to optimize bids.

Instructions

Compare Google Ads campaign performance across device segments (Desktop / Mobile / Tablet). Returns {campaign_id, campaign_name, period, devices:[{device_type, impressions, clicks, cost, conversions, ctr (percent), average_cpc, cpa, cvr (percent)}], insights:[strings]}, sorted by cost descending. cpa is None when conversions == 0. Insights fire for devices with spend and zero conversions, worst/best CPA ratios > 1.5x, and Mobile CTR less than half of Desktop CTR. Read-only. Returns a 'message' field and empty devices list when no device-segmented data exists. For applying device bid modifiers use google_ads_bid_adjustments_update or google_ads_device_targeting_set; for the raw ad-schedule criteria (hour-of-day targeting config, NOT performance segmentation by hour) use google_ads_schedule_targeting_list.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
periodNoReporting window for the metrics. Default 'LAST_30_DAYS'. Use a shorter window (LAST_7_DAYS / LAST_14_DAYS) when diagnosing recent changes; use LAST_90_DAYS for trend baselines. Also accepts an explicit range in GAQL spelling — "BETWEEN 'YYYY-MM-DD' AND 'YYYY-MM-DD'", both endpoints inclusive, in the account's time zone — for a window no trailing constant can reach (e.g. a single past calendar month). One asymmetry to know about: every constant except LAST_90_DAYS is resolved by Google Ads in the account's reporting time zone, whereas LAST_90_DAYS has no API constant and is expanded by mureo into the 90 days ending yesterday **on the server's date**, so its edges can differ by a day when the server and the account are in different zones. Pass an explicit range when the exact boundary matters.
campaign_idYesCampaign ID as a numeric string without dashes (e.g. '23743184133'). Obtain via google_ads_campaigns_list.
customer_idNoGoogle Ads customer ID as a 10-digit string without dashes (e.g. '1234567890'). Optional — falls back to GOOGLE_ADS_CUSTOMER_ID / GOOGLE_ADS_LOGIN_CUSTOMER_ID from the configured credentials when omitted.

Schema Changelog

Changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. Changed3 schema fields changedv0.17.1
    • addedInput schema / properties / period / anyOf
      Added value: +[
      +  {
      +    "enum": [
      +      "TODAY",
      +      "YESTERDAY",
      +      "THIS_WEEK_SUN_TODAY",
      +      "THIS_WEEK_MON_TODAY",
      +      "LAST_BUSINESS_WEEK",
      +      "LAST_WEEK_SUN_SAT",
      +      "LAST_WEEK_MON_SUN",
      +      "LAST_7_DAYS",
      +      "LAST_14_DAYS",
      +      "LAST_30_DAYS",
      +      "LAST_90_DAYS",
      +      "THIS_MONTH",
      +      "LAST_MONTH"
      +    ],
      +    "type": "string"
      +  },
      +  {
      +    "pattern": "\\ABETWEEN '([0-9]{4}-[0-9]{2}-[0-9]{2})' AND '([0-9]{4}-[0-9]{2}-[0-9]{2})'\\Z",
      +    "type": "string"
      +  }
      +]
    • changedInput schema / properties / period / description
      Previous value: -"Reporting window for the metrics. Default 'LAST_30_DAYS'. Use a shorter window (LAST_7_DAYS / LAST_14_DAYS) when diagnosing recent changes; use LAST_90_DAYS for trend baselines."New value: +"Reporting window for the metrics. Default 'LAST_30_DAYS'. Use a shorter window (LAST_7_DAYS / LAST_14_DAYS) when diagnosing recent changes; use LAST_90_DAYS for trend baselines. Also accepts an explicit range in GAQL spelling — \"BETWEEN 'YYYY-MM-DD' AND 'YYYY-MM-DD'\", both endpoints inclusive, in the account's time zone — for a window no trailing constant can reach (e.g. a single past calendar month). One asymmetry to know about: every constant except LAST_90_DAYS is resolved by Google Ads in the account's reporting time zone, whereas LAST_90_DAYS has no API constant and is expanded by mureo into the 90 days ending yesterday **on the server's date**, so its edges can differ by a day when the server and the account are in different zones. Pass an explicit range when the exact boundary matters."
    • removedInput schema / properties / period / enum
      Removed value: -[
      -  "TODAY",
      -  "YESTERDAY",
      -  "LAST_7_DAYS",
      -  "LAST_14_DAYS",
      -  "LAST_30_DAYS",
      -  "LAST_90_DAYS",
      -  "THIS_MONTH",
      -  "LAST_MONTH"
      -]
  2. Changed1 schema field changedv0.10.37
    • addedInput schema / additionalProperties
      Added value: +false
  3. Addedv0.10.11
  4. Removedv0.10.9
  5. Addedv0.9.12
  6. Removedv0.9.6
  7. Addedv0.9.2
  8. Removedv0.9.1
  9. Addedv1.0.5

TDQS

A4.7/5.0
Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

There are no annotations, so the description carries the full burden, and it fully delivers: it declares 'Read-only', specifies return ordering ('sorted by cost descending'), documents edge cases ('cpa is None when conversions == 0', 'returns a message field and empty devices list when no device-segmented data exists'), and spells out exact insight conditions.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is front-loaded with the primary purpose and then packs high-value details: return shape, ordering, edge cases, insight logic, read-only status, and sibling alternatives. Every sentence earned its place; there is no filler or repetition.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given no output schema, the description correctly explains the return shape, nested devices array, insights, and special empty-result case. All behavioral and routing information an agent would need to call this tool correctly is present.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the schema already documents all three parameters thoroughly. The tool description itself doesn't add parameter-level detail, which is acceptable; however it also doesn't go beyond the schema for parameters, so the baseline score of 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description opens with a specific verb ('Compare') and a clear resource ('Google Ads campaign performance across device segments'), making the tool's exact job unambiguous. It also distinguishes itself from related tools by noting it is not for bid modifiers or hour-of-day targeting configuration.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicit routing is provided: 'For applying device bid modifiers use google_ads_bid_adjustments_update or google_ads_device_targeting_set' and 'for the raw ad-schedule criteria ... use google_ads_schedule_targeting_list'. This tells an agent exactly when to pick an alternative, leaving nothing to inference.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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