Short answer: not in the decorator. In Prefect 3.x,

task_run_name

supports dynamic formatting with parameters, but

tags

on the

@task

decorator are static. A literal

tags=["{target}-load"]

will stay exactly that string. Supported ways to add dynamic tags: - Use the

prefect.tags(...)

context manager around the call site - Use

task.with_options(tags=[...])

at call time Examples:

from prefect import task, flow, tags

@task(name="load", task_run_name="load-{target_date}", tags={"static"})
def load(target: str, target_date: str):
    ...

@flow
def etl(target: str, target_date: str):
    # 1) Context manager — tags are added to all task runs inside this block
    with tags(f"{target}-load"):
        load(target=target, target_date=target_date)

    # 2) with_options at call-time — creates a modified copy of the task
    load.with_options(tags=[f"{target}-load"])(target=target, target_date=target_date)

Notes: - Tags from the decorator and from

prefect.tags(...)

are combined. -

task_run_name="load-{target_date}"

will format using the task’s parameters. Refs: - Task decorator API (incl.

tags

and

task_run_name

): Task API - Tags context manager source/docs: prefect.context.tags - Task class

with_options

(supports

tags

at call time): prefect.tasks.Task - How-to: tag-based concurrency limits: Tag-based concurrency