{"version":"2.1.304","anchor":"unknown-tool-telemetry-marks-mcp-hidden-tools","canonical_anchor":"unknown-tool-telemetry-marks-mcp-hidden-tools","heading":"Usage data now notes when a missing tool was hidden for MCP","tier":"internal","area":"Telemetry","scope":"individual","heads_up":false,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.304\/e\/unknown-tool-telemetry-marks-mcp-hidden-tools","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.304","markdown":"### Usage data now notes when a missing tool was hidden for MCP\n\nWhen Claude asks for a tool that does not exist, usage data now notes whether that tool was hidden for MCP\n\n**What**\n\nWhen Claude tries to use a tool that cannot be found, Claude Code records usage data about the error. That data now includes a marker when the missing tool is one that was hidden under an MCP-related condition (MCP being the way outside programs add tools).\n\n**Why**\n\nThis only changes recorded usage data; how tools work is unchanged.\n\n- Area: Telemetry\n- Tier: Under the hood\n- Useful: 1\/5\n- Signal: 2\/5\n- Scope: individual\n- Heads-up: no"}