Follow Discord
Sweep 23 Oct 2026 · 21:48Z Build v2.1.310 529 read Stable v2.1.308 Latest v2.1.310 Next v2.1.310 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeReleasesv2.1.310entry #203

Claude Code v2.1.310 ·

MCP tool permission check now accounts for refused legacy access grants

The permission check for MCP tools now reacts when an older-style access grant was refused, for plugin servers or failed owner checks

Under the hood Internal Changes
JSON All of v2.1.310
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
MCPArea: what it touches
Internal ChangesKind: in v2.1.310,
Internal ChangesSection of the release

Unclear It is not clear whether a refused legacy grant now blocks the tool, asks for approval, or something else.

What

MCP servers are add-ons that give Claude extra tools. Claude Code checks whether each MCP tool is allowed to run. That check now also responds when an older-style access grant has been refused. It does this when the server comes from a plugin, or when the older ownership check fails.

A separate check now also picks out servers that are not set up through claude.ai and whose names start with a particular prefix.

Why

This tightens how older MCP access grants are honoured.

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 a refused legacy grant now blocks the tool, asks for approval, or something else.

See this entry in the whole of v2.1.310 →

Feedback