Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.278 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.277 ·

Tool-execution error/telemetry logs now redact tool names and truncate error content by structure, not raw text

Tool error and permission-denial debug logs now report structured metadata instead of raw tool names and text snippets

TierYou'll noticehow much it should matter to you
Useful2my rating, 1 to 5
Signal2worth watching, 1 to 5
AreaTool Validationwhat it touches
KindImprovementsin v2.1.277,
You'll notice

Tool error and permission-denial debug logs now report structured metadata instead of raw tool names and text snippets

What

Local debug log lines for tool input validation errors, validate-input rejections, permission denials, and runtime tool errors no longer include a raw slice of the offending input, message, or error text. Instead they report structured details: issue codes, byte/character counts, and error codes. These log lines also now use a new classifier that labels skill tools, MCP tools, and dynamically-named tools with a generic label like skill_tool, mcp_tool, or dynamic_tool instead of printing the tool's literal name.

Why

This keeps potentially sensitive tool names and raw error content out of debug logs while still giving useful, structured information for diagnosing tool failures.

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