What probably matters to youSection of the release
Unclear Which setting turns on these plugin hooks, and whether they are on by default.
What
An MCP server is an outside program that gives Claude extra tools. A plugin hook is code from a plugin that runs at a set point. Plugin hooks that run when Claude Code connects to an MCP server can now:
Hold the server back, so it stays switched off for now
Let a held server join later
When a plugin holds a server back, Claude Code records that the plugin holds a server back. If you try to use the server meanwhile, the error message says the server is still connecting or is turned off.
Why
A plugin can now decide whether an MCP server connects, which changes whether that server shows up in /mcp.
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 doubtWhich setting turns on these plugin hooks, and whether they are on by default.
Anthropic's release notes agreeFixed /mcp and /plugins opening an MCP server's page with the cursor on "Disable" when the server needs authentication but still holds its…
