MCP for Chatbots, CLI for Coding Agents: Use Both
CLI outperforms MCP in coding agents by using less context and enabling composable command chains; MCP wins for chatbots with easier setup, scoped auth, and remote access. Serious setups combine both.
CLI Advantages Drive Explosion in Coding Agents
CLI tools surged because they consume far less context window than MCP—pairing short CLI commands with 'skills' (prompt-based docs via progressive disclosure) keeps chats efficient without loading full tool descriptions. Agents excel at CLI since LLMs are trained on terminal syntax, enabling dynamic piping of commands (e.g., chain GitHub's 'gh' CLI for repo tasks without needing its MCP). Playwright CLI beats its MCP counterpart for browser automation: same visual validation loops (agent checks website clicks) but uses a fraction of context. Google Workspace CLI unlocks 85 tools with matching skills library; others like Stripe, Ramp, 11 Labs, Supabase CLI, notebooklm-pi (links Claude Code to NotebookLM for YouTube offloads), and iMessage CLI allow agents to build workflows on-the-fly, mimicking code mode's strength where agents write code better than rigid tool calls.
Trade-off: CLI demands shell access to your filesystem/terminal, suiting unsandboxed coding agents like Claude Code, Cursor, OpenCloud—not chatbots.
MCP Persists for Scoped, Remote, Enterprise Access
MCP (Model Context Protocol, aka connectors) standardizes agent-tool links across Claude, ChatGPT, Cursor—enabling database checks, posts, searches. Early flaw: verbose tool defs bloated context, degrading chats with many tools. Fixes underway: Anthropic's lazy tool calling in Claude Code; Cloudflare's code mode paper runs MCPs in code environments offloading context.
MCP shines for auth scoping (e.g., Supabase MCP limits to one project/permissions vs CLI's full credential access), easy setup/disconnect/edit via UI (no terminal paths), and remote use (access Supabase DB from phone/cloud apps, shared across Claude Desktop/Co-work/Code). Enterprise favors MCP's sandboxing over CLI's broad permissions.
Decision Framework: Match Tool to Surface and Use Case
Chatbots (ChatGPT, Claude, Claude Co-work): Default to MCP—sandboxed, permission-gated, low technical overhead. Coding agents (Claude Code, Cursor): Prioritize CLI for context efficiency and composability, assuming terminal access.
Hybrid reality: Use both per device/surface/sandbox. Example: Supabase MCP for remote/project-scoped needs, CLI in pure coding envs. Google Workspace CLI sets broad scopes once with skills guiding usage. CLI demands technical setup/more access; MCP is simpler but context-heavier. Neither obsoletes the other—CLI adds a low-overhead door for agents.