{"version":"2.1.85","anchor":"built-in-mcp-server-toggle-gradual-rollout","canonical_anchor":"built-in-mcp-server-toggle-gradual-rollout","heading":"Built-in MCP Server Toggle [Gradual Rollout]","tier":null,"area":null,"scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.85\/e\/built-in-mcp-server-toggle-gradual-rollout","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.85","markdown":"### Built-in MCP Server Toggle [Gradual Rollout]\n\n**What**\n\nA mechanism to toggle built-in MCP servers on\/off.\n\n**Status**\n\nFeature-flagged behind `tengu_builtin_mcp_toggle`.\n\n**Details**\n\n- Tracks the server name and whether it's being enabled or disabled\n- Related to managing a `disabledMcpServers` list in application state\n- When enabled, users will be able to selectively disable built-in MCP servers\n\n**Evidence**\n\nMCP toggle tracking (gated by `tengu_builtin_mcp_toggle`, search for `\"disabledMcpServers\"`)"}