updatedToolOutput
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.
What it is
A hook using only the older MCP output field no longer silently rewrites tool results.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.236.
Presence across releases
The 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.
Changelog entries naming it
-
v2.1.236Old-style MCP tool-output rewrites from hooks are no longer applied silently
A hook using only the older MCP output field no longer silently rewrites tool results.
named in this entry
Documentation pages
- Intercept and control agent behavior with hooks mentions it Claude Code CLI
- Agent SDK reference - Python mentions it Claude Code CLI
- Agent SDK reference - TypeScript mentions it Claude Code CLI
- Hooks reference mentions it Claude Code CLI
- Week 18 · April 27 – May 1, 2026 mentions it Claude Code CLI
A reference table page is one whose own table defines this name, and it is where the description above came from. A page that mentions it carries the name somewhere in its text and may say nothing about it at all. Every page carrying it.
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.