tool.output
A Claude Code settings key, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.
A tool.output telemetry event can carry file contents, diffs and bash commands after a successful tool call, behind a gate.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.257.
In the changelogs
3Releases whose published page names tool.output.
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v2.1.283
Tracing can record MCP and some built-in tool results as tool.output
When tracing is on, results from MCP tools and some built-in tools are stored on tracing spans as tool.output, with account memory redacted
found in this entry's text, named in this entry
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v2.1.268
New bash-command classification added to tool telemetry, gated behind an enhanced-telemetry beta flag
Bash tool telemetry now breaks commands into class, program name, subcommand, and pipe usage, behind a beta flag
found in this entry's text
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v2.1.257
Tool dispatch can emit a 'tool.output' telemetry event with file contents/diffs/commands
A tool.output telemetry event can carry file contents, diffs and bash commands after a successful tool call, behind a gate.
named in this entry, found in this entry's text
First cited
0No release's published evidence quotes this name. The ledger indexes the Evidence lines of every changelog on this site, so this says nobody here has ever quoted it; it says nothing about how old the name is.
Presence across releases
0The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.
Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the settings key does. All settings keys.