Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
MCPArea: what it touches
Internal ChangesKind: in v2.1.268,
Internal ChangesSection of the release
What
The tengu_mcp_tools_listed telemetry event, sent when Claude Code lists tools from an MCP server, now includes four new fields about the length of tool descriptions returned by that server: descriptionTotalLength, descriptionMaxLength, descriptionMeanLength, and descriptionOverLimitCount (how many descriptions exceed a configured size limit).
Why
This gives visibility into how verbose an MCP server's tool descriptions are, which can help identify servers whose overly long descriptions might affect performance or context usage.
