{"version":"2.1.280","anchor":"mcp-outputdescription-truncation-length-now-overridable-via","canonical_anchor":"mcp-outputdescription-truncation-length-now-overridable-via","heading":"MCP output\/description truncation length now overridable via env var","tier":"use","area":"MCP","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.280\/e\/mcp-outputdescription-truncation-length-now-overridable-via","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.280","markdown":"### MCP output\/description truncation length now overridable via env var\n\nMCP output and description truncation length is now configurable via CLAUDE_CODE_MAX_MCP_DESCRIPTION_LENGTH\n\n**What**\n\nThe character limit used to truncate MCP (Model Context Protocol) tool output and instructions was previously a fixed, hardcoded number. It can now be set with the environment variable `CLAUDE_CODE_MAX_MCP_DESCRIPTION_LENGTH`. If the variable isn't set, Claude Code falls back to the same default length as before.\n\n**Why**\n\nThis lets users or teams with MCP tools that produce longer descriptions or output raise the truncation limit instead of being stuck with the built-in default.\n\n- Area: MCP\n- Names: `CLAUDE_CODE_MAX_MCP_DESCRIPTION_LENGTH`\n- Tier: Use it now\n- Useful: 3\/5\n- Signal: 2\/5"}