Returns a paginated list of tags (both correlation and metric kinds)
defined across the tenant's datasets. Each entry groups all per-dataset
definitions of a single (name, kind) pair.

Use GET /v1/tags/values to search tag values.

Filtering and ordering with CEL

The filter and orderBy query parameters are evaluated as
Common Expression Language (CEL) expressions over
each tag in the response.

Available CEL fields

• name (string) — tag name; supports .matches("regex")
• kind (string) — "Correlation" or "Metric"
• datasetCount (int) — number of distinct datasets defining the tag
• mappings (list) — per-dataset definitions; supports .exists(m, ...)
  quantifier. Each m exposes:
  • m.dataset.id (int) — dataset id
  • m.dataset.label (string) — dataset label (available without
    expand); matches the dataset.record.label returned in the body
  • m.path.field (string)
  • m.path.path (string)
  • m.origin.id (int, null for Metric) — dataset where the mapping
    was originally declared. Equals m.dataset.id when declared
    directly on that dataset; differs when inherited from upstream.
  • m.origin.label (string, null for Metric) — label of the origin
    dataset; guard with m.origin != null before accessing.
  • m.createdBy.id (int, null for Metric)

Available CEL functions

The tag CEL environment registers the CEL standard
definitions
(operators, in, ?:, size(), string.contains, string.startsWith,
string.endsWith, matches, etc.) plus the following extension
libraries from
cel-go v0.28.0:

• ext.Strings — charAt, indexOf, join, lowerAscii, replace, split, substring, trim, upperAscii, format
• ext.Lists — lists.flatten, lists.range, lists.slice
• ext.Math — math.greatest, math.least
• ext.Sets — sets.contains, sets.equivalent, sets.intersects
• ext.Regex — re.capture, re.extract
• ext.Encoders — base64.encode, base64.decode
• ext.Bindings — cel.bind for let-binding sub-expressions
• ext.Protos — protobuf helpers
• cel.OptionalTypes — optional.of, optional.ofNonZero, optional.none

Defaults

• Default page size: 50; maximum: 100.
• Default order: kind ascending, then name ascending.

Set expand=true to inline the dataset.record brief (label,
description, iconUrl, contentType) on every dataset reference.

Set sampleValues=true to attach a bounded sample of each tag's
values (see the sampleValues parameter).