Tag coverage audit: the agent finds allocation gaps and drafts the rules
Find which label keys could become dimensions, how much spend each one covers, and where untagged cost is concentrated.
Runs in
Claude · Slack
First optimization recommendation
The next day
ROI
Pays for itself with the first recommendation you act on
Which label keys cover the most spend, and where is untagged cost concentrated by account and service?
Tag 'team' covers 71% of spend. Untagged: €23,800/month, 58% of it in 4 accounts. Biggest gap: the shared-data account (€7,900), mostly BigQuery and GCS. Suggested rule: map project prefix 'dwh-' to Data.
Owners tag the top gaps the agent lists, or accept a rule instead.
Playbook
What the agent does
From what Costory notices to what you decide. Costory suggests the next step in conversation, and you decide whether to go ahead.
Costory notices
Weekly, or when untagged spend jumps.
Costory investigates
01
List label keys
Costory lists the label keys found in billing data with their cost-allocation stats.
02
Rank gaps
Claude ranks untagged spend by service, account and owner.
03
Propose fixes
Suggested tags or rules for the biggest gaps.
04
Track progress
A weekly coverage report goes to #finops.
Where you see it
Claude
You decide
Owners tag the top gaps the agent lists, or accept a rule instead.
Why it matters
Teams know tagging is incomplete, but not where it matters. Fixing the top five gaps is usually worth more than a company-wide campaign.
Who it’s for
FinOps leads, platform engineers
Where it runs
Claude · Slack
What you get
What lands in front of your team
Coverage by key
Know which tags are reliable enough to allocate on.
Top gaps first
Fix the few resources that matter most.
Weekly tracking
Coverage trend in the channel of your choice.
Sources and assistants
What it connects
Data sources
Example prompts
Or drive it yourself
Audit
Which label keys cover the most spend, and where is untagged cost concentrated by account and service?
Report
Post a weekly tag coverage summary to #finops with the top 5 untagged resources by cost.
FAQ
Questions about this playbook
What if our tagging is incomplete?
Costory's Virtual Dimensions allocate with rules on accounts, projects, names and partial tags, so you don't need perfect tagging to start. Shared and untagged cost is reallocated dynamically using the metrics you already have (Datadog, Tsuga, BigQuery, Snowflake and more), and the allocation stays consistent as usage moves.
How long does this playbook take to set up?
Connecting your billing data and the Costory MCP takes under 30 minutes with Terraform or CloudFormation. The playbook itself takes minutes: pick the scope, the trigger and the Slack channel. The first billing data lands the next day, and the agent starts from there.
Can we adjust what the agent does?
Yes. You choose the trigger, the scope (team, service, environment), the channel and the format, and you can pause or change it at any time.
Does Costory change anything in our cloud accounts?
No. Costory reads billing exports and the metrics you connect, and has no write access to your cloud. Actions it takes create Costory objects only: alerts, reports, dashboards and events. Your team stays in control of every change.
Step-by-step guide in the Costory docs
Related playbooks
Run these alongside it
Costory notices
The unallocated bucket grows above your threshold.
Allocate cloud costs without perfect tagging
Map accounts, projects, resource names and partial tags to teams with rules, instead of waiting for a tagging project to finish.
See the playbook
Costory notices
A new account, project or cluster appears in billing.
Split production and non-production costs automatically
Allocate every cost line to prod, staging, dev or sandbox using account names, projects, clusters and labels.
See the playbook
Costory notices
Every Monday at 9:00, for each team.
Weekly showback per team, posted in each team's Slack channel
Every engineering team gets its own weekly cost report in its own Slack channel, scoped to the services it owns.
See the playbook
Put this playbook on call
Included in every plan, from €250/month. 30-day free trial: connect in under 30 minutes, get your first optimization recommendation the next day.
First optimization recommendation
The next day
ROI
Pays for itself with the first recommendation you act on
Setup
About 30 minutes
Data residency
EU
Access
Read-only on your cloud