Source Intelligence

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.

All of v2.1.248 Home All releases olderv2.1.247 v2.1.250newer
Claude Code v2.1.248

MCP server names can be withheld from attachments, and revoked tools counted

Under the hood
Useful2 Signal3
MCP

Connecting MCP server names can be left out of request context, and revoked tools are counted.

What

When some MCP servers are still connecting or waiting on authentication, their names can now be left out of the context attached to a request, and a new step tallies tools that have been revoked along with why.

Details
  • The revoked-tool tally is a per-cause count included in the attachment payload.
  • Suppression depends on a check against the session's tool set; what that check tests is not visible in this code.
Evidence

keepMcp: !rI(t.options.tools)

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

See this entry in the whole of v2.1.248 →