{"version":"2.1.310","anchor":"mcp-serve-stderr-warns-about-denies-on-another-host","canonical_anchor":"mcp-serve-stderr-warns-about-denies-on-another-host","heading":"Running Claude Code as an MCP server can print a warning about deny rules on another host","tier":"notice","area":"MCP","scope":"individual","heads_up":false,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.310\/e\/mcp-serve-stderr-warns-about-denies-on-another-host","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.310","markdown":"### Running Claude Code as an MCP server can print a warning about deny rules on another host\n\nWhen Claude Code starts as an MCP server, it can now print a warning to its error output about deny rules on another host\n\n**Unclear.** When the warning appears and exactly what it says is not shown.\n\n**What**\n\nMCP is a standard way for tools to talk to each other, and Claude Code can run as an MCP server for other programs. When it starts that way, it can now print an extra warning to its error output (stderr) about deny permission rules on another host.\n\n**Why**\n\nIf you run Claude Code as an MCP server, you may see a new warning line at startup.\n\n- Area: MCP\n- Tier: You'll notice\n- Useful: 1\/5\n- Signal: 1\/5\n- Scope: individual\n- Heads-up: no"}