## Lesson — Standard console.log or console.error calls in MCP tools

**Tags:** style, curated
**Pattern:** \bconsole\.(log|error)\(
**Engine:** regex
**Scope:** packages/mcp/**/*.ts, packages/mcp/**/*.js, !**/*.test.ts, !**/*.test.js
**Severity:** warning

Standard console.log or console.error calls in MCP tools.
