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 v2.1.321,
ImprovementsSection of the release
What
MCP tools are tools supplied by outside programs. For these tools, Claude Code now keeps the original text of the input alongside the version it has read, when doing so is safe. It uses that text so the input sent matches it as written.
Why
Values such as very large numbers are less likely to be changed on the way to an MCP tool.
