Claude Code v2.1.281 ·
Tool-result size telemetry: token estimate, media count, will-persist flag
Usage data now records a tool result's estimated tokens, image and document count, and whether it will be saved to disk
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
TelemetryArea: what it touches
Internal ChangesKind: in v2.1.281,
Internal ChangesSection of the release
What
A tool result is what a tool hands back to Claude after it runs. A new helper records three measurements of it in usage data:
toolResultTokensEst, an estimate of its size in tokens (the units the model reads text in)toolResultMediaBlocks, how many images or documents it containstoolResultWillPersist, whether it is large enough to be saved rather than kept inline
If the measurement fails, the error is ignored.
Why
This adds measurement only. A failure inside it never interrupts the tool call.
See this entry in the whole of v2.1.281 →
