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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.228 11 Aug 2026

MCP tool telemetry attributes tools to their plugin

Under the hood

Useful2 Signal2

MCP

Tool calls from plugin-supplied MCP servers are now attributed to their plugin in telemetry.

What

Tool calls served by an MCP server that came from a plugin now carry plugin attribution in telemetry, at each tool result and error site. Servers you configured yourself are unaffected.

Details

Redaction allowlist gains plugin_id_hash, plugin_name_redacted and marketplace_name_redacted.
The attribution blob is attached to the tool descriptor only when the server config names a plugin source.

Evidence

pluginTelemetry, plugin_name_redacted

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.228 →