{"version":"2.1.280","anchor":"new-telemetry-for-sdk-mcp-first-query-wait-time","canonical_anchor":"new-telemetry-for-sdk-mcp-first-query-wait-time","heading":"New telemetry for SDK MCP first-query wait time","tier":"internal","area":"MCP","url":"https:\/\/changelogs.core-directive.com\/v\/2.1.280\/e\/new-telemetry-for-sdk-mcp-first-query-wait-time","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.280","markdown":"### New telemetry for SDK MCP first-query wait time\n\nNew telemetry tracks how long a turn waits for SDK MCP servers to connect\n\n**What**\n\nWhen a turn starts before SDK MCP servers (Model Context Protocol servers set up through the SDK) have finished connecting, Claude Code now records a metric, `sdk_mcp_first_query_wait_ms`, capturing how long the turn had to wait. This is in addition to the existing warning message that tools aren't available yet.\n\n**Why**\n\nThis gives visibility into how much delay is caused by MCP servers still connecting when a query starts, which can help identify slow-starting servers.\n\n- Area: MCP\n- Tier: Under the hood\n- Useful: 1\/5\n- Signal: 1\/5"}