You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.323,
ImprovementsSection of the release
Unclear It is not clear whether the directory-listing tool is available to everyone or held behind a separate check.
What
MCP (Model Context Protocol) servers are add-ons that give Claude extra tools and data. Some of Claude Code's tools for them are deferred, meaning Claude finds them through tool search instead of seeing them all the time. Several now carry a hint on when to use them:
The MCP directory-listing tool, which lists one level per call and works only on servers that support directory listing.
The claude.ai connector listing tool, which also gets an ID in a registry of tools.
The ReadMcpResource tool, which points to the list tool and, for directories, to the directory-read tool.
Successful listings now record their use before the result is returned, and ReadMcpResource records its result per server.
Why
The hints help Claude pick the right one of these tools when it searches for them.
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 clear whether the directory-listing tool is available to everyone or held behind a separate check.
Anthropic's release notes agreeFixed a case where the Write and Edit tools could write to a path covered by a Read deny rule
