Unclear It is not clear what makes a hook hold an MCP server, or how you would release it.
MCP servers are outside programs that give Claude Code extra tools. A hook is a command you configure to run at set points while Claude Code works. When a hook is holding an MCP server, a connection attempt to that server now fails with the error "MCP server held by a hook".
There are a few other changes to connecting:
- Failed connection attempts now carry the reason why a server address was not forwarded.
- A successful connection now clears that server from the list of servers whose refresh was refused.
- The usage data recorded for each connection gains a new compatibility field.
When a connection fails because a hook is holding the server, the error now says so instead of looking like an ordinary connection problem.
tengu_mcp_connect_timeout_retry Not enough to sayNothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.
This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.323: on
These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.
Read once, for one account on one subscription tier, against v2.1.323. It isn't a statement about your account. What a flag value here can and cannot tell you
It is not clear what makes a hook hold an MCP server, or how you would release it.