Tools

The Tools view measures the tools behind your runs over a window: the last hour, 24 hours, 7 or 30 days, optionally for one toolset.

The Tools view: calls, failures, retries and latency percentiles per tool, grouped by server

At the top: the calls completed, how many failed, the retries, and the slowest tool. Then each tool, grouped by MCP server, group of host tools and built-ins:

Column	What
Calls, Failed, Error rate	How many calls completed, and how many failed
By kind	The failures by kind: an error, a timeout, an unavailable server, an unknown outcome
Retries	Attempts beyond the first: calls sent again after a transient failure or a lost claim
p50, p95, p99, max	Latency, from the call to its result

A slow or failing tool slows or fails every script that calls it: this is where to look when the Overview’s Failing tools lights up. The SDK reads the same figures with rewind.tools.stats(). The Tools view is not available to a member limited to labels.

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