Hermes Agent MCP slows down as soon as it is connected?

Hermes Agent slows down as soon as you connect to MCP, usually not because of the MCP concept, but because you are exposing too many tools, resources, or prompts at once. The official MCP guidelines repeatedly emphasize that MCPs should start with the gadget side and use include whitelists to control visibility capabilities.

Do subtraction first

1. An MCP server starts with only 2-5 tools that are really needed.
2. Prioritize tools.include for hazardous systems, not just exclude.
3. Temporarily turn off unused resources and prompts.
4. Perform /reload-mcp after the changes, and don't think that the configuration will be automatically hot-updated.

If you connect GitHub, browsers, databases, and internal APIs all at once, the model will have to understand a lot of tool instructions every round, and the context will naturally become heavier and the call judgment will be worse.

In a word: MCP card is slow, first shrink the tool surface, and then talk about changing the model.

Official open source address: https://github.com/NousResearch/hermes-agent; Official document entry: https://hermes-agent.nousresearch.com/.