𝗠𝗖𝗣 𝘃𝘀 𝗖𝗟𝗜: 𝗠𝗖𝗣 𝗨𝘀𝗲𝘀 𝟭𝟳𝘅 𝗠𝗼𝗿𝗲 𝗧𝗼𝗸𝗲𝗻𝘀

𝗠𝗖𝗣 𝘃𝘀 𝗖𝗟𝗜: 𝗠𝗖𝗣 𝗨𝘀𝗲𝘀 𝟭𝟳𝘅 𝗠𝗼𝗿𝗲 𝗧𝗼𝗸𝗲𝗻𝘀

I build AI agents. I tested two ways to give agents tools. One is MCP. One is direct CLI calls.

MCP is the new standard. But it costs more. I measured the tokens.

MCP results:

• 3,400 tokens per call.
• 280ms latency.

CLI results:

• 200 tokens per call.
• 45ms latency.

MCP uses 17x more tokens.

Why is MCP expensive?

• It sends full JSON schemas with every request.
• It wraps responses in metadata.
• Protocol framing adds more tokens.

CLI is simple. Raw input. Raw output. No schemas. No envelopes.

Use MCP when:

• You need agents to find tools.
• You want reusable tool servers.
• You need granular security.
• You share tools with a team.

My hybrid setup:

• Use CLI for simple tasks.
• Use MCP for complex tasks.
• Cache your results.

This hybrid method cut token use by 60%. Cost dropped from $8.64 to $3.45 per day.

Key lessons:

• Measure your costs.
• Not all tools need MCP.
• Small schemas save money.
• Use a hybrid approach.

Did you measure your agent token use? Tell me in the comments.

Source: https://dev.to/tim_zhang11/i-measured-mcp-vs-cli-for-agent-tool-use-mcp-used-17x-more-tokens-per-call-3egc Optional learning community: https://t.me/GyaanSetuAi