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Sweep 27 Oct 2026 · 19:04Z Build v2.1.312 531 read Stable v2.1.308 Latest v2.1.312 Next v2.1.312 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.311 ·

MCP blocks now say when Claude Code itself did the blocking

MCP servers and tools blocked by Claude Code itself are now marked byClaudeCode and shown as "disabled by Claude Code"

Group of 2 You'll notice Improvements
JSON All of v2.1.311
You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.311,
ImprovementsSection of the release

Unclear It is not known whether the message you see about a blocked server changes.

What

MCP servers are outside programs that give Claude extra tools. Some are blocked by your organization's settings, and some are refused by Claude Code itself. These two cases are now told apart.

  • A server's org_blocked status now includes byClaudeCode: true when Claude Code itself refuses the server's configuration. Before, the status carried only the server name. How this changes the text on screen was not traced.
  • The MCP tools dialog now says "disabled by Claude Code" when a tool is blocked by Claude Code rather than by your organization. Before, it always said "disabled by your organization".
  • The message about deferred tools has a matching variant, including the wording "Claude Code itself blocks this tool from MCP server".

Why

You can now see who blocked a server or tool. A block from Claude Code itself is no longer reported as an organization policy, so you know whether to ask an administrator or change the server's configuration.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtIt is not known whether the message you see about a blocked server changes.

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