How it's organised

Everything is configured with records, in the Setup Portal. No code change is needed to reshape an agent or an MCP server.

Agent --uses--> LLM
  |
  +-- has --> Topic --+-- has --> Instructions   (what the agent is told)
                      +-- has --> Tools          (what the agent can do)

MCP Server -- has --> Tools                      (what a client can do)

• Tool: points at an Apex class. The same tool can be given to topics and to MCP servers.
• Topic: a bundle of instructions and tools. An agent can have several.
• Instruction: a block of guidance added to the agent’s prompt, in order.
• LLM: a model, the named credential used to reach it, and its token prices for cost tracking.

You can have as many agents, topics, tools and MCP servers as you need.

• To change an agent or build a new one, see Customise an agent.
• To change what a server exposes or add another, see Configure MCP servers.
• To add a capability, see Add your own tool.

The MCP server has no instructions or topics. It exposes tools, and the connected client decides how to use them.