/use-mcp

Execute Model Context Protocol (MCP) operations via Gemini CLI to preserve context budget.

Syntax

/use-mcp [task]

How It Works

  1. Primary: Execute via Gemini CLI (stdin pipe):

    echo "$ARGUMENTS. Return JSON only per GEMINI.md instructions." | gemini -y -m gemini-2.5-flash

  2. Fallback: If Gemini CLI unavailable, use mcp-manager subagent

Key Rules

  • MUST use stdin piping - deprecated -p flag skips MCP initialization
  • Use -y flag to auto-approve tool execution
  • GEMINI.md auto-loaded from project root
  • Response format: {"server":"name","tool":"name","success":true,"result":<data>,"error":null}

Anti-Pattern

# ❌ BROKEN - deprecated -p flag skips MCP connections!
gemini -y -m gemini-2.5-flash -p "..."

# ✅ CORRECT
echo "your task" | gemini -y -m gemini-2.5-flash

When to Use

  • Browser automation via MCP
  • External tool integrations
  • Database operations via MCP
  • Any task requiring MCP server tools

Key Takeaway: Use /use-mcp to execute MCP operations through Gemini CLI with stdin piping, preserving Claude’s context budget.