Agentic Loop

Agentic AI is just tool calling in a loop until the model is finished. You are the dispatcher that runs tools, returns results, and lets the model keep going.

The Loop (Model ↔ Tools)

1. Model decides to call a tool.
2. Dispatcher executes the tool with the JSON arguments.
3. Dispatcher returns the tool result to the model.
4. Model continues with the new information.
5. Repeat until the model stops calling tools and returns a final answer.

Example: You Are the Dispatcher

1) Model requests a tool

{
  "role": "assistant",
  "content": "",
  "tool_calls": [
    {
      "name": "get_bitcoin_price_usd",
      "arguments": "{}"
    }
  ]
}

2) You run the tool and send the result back

{
  "role": "tool",
  "name": "get_bitcoin_price_usd",
  "content": "{\"price_usd\": 68000, \"source\": \"example\"}"
}

3) Model finishes the response

{
  "role": "assistant",
  "content": "Bitcoin is trading at about $68,000 USD based on the tool result."
}

That’s the whole pattern. If the model needs more data, it calls another tool. If not, it stops.

API Call with Full History

Use the full message history when you call the model again after executing a tool.

curl http://localhost:11434/api/chat \
  -H "Content-Type: application/json" \
  -d '{
    "model": "granite4:tiny-h",
    "stream": false,
    "messages": [
      {
        "role": "system",
        "content": "You are a precise assistant that admits uncertainty."
      },
      {
        "role": "user",
        "content": "What is the price of Bitcoin today in USD?"
      },
      {
        "role": "assistant",
        "content": "",
        "tool_calls": [
          {
            "name": "get_bitcoin_price_usd",
            "arguments": "{}"
          }
        ]
      },
      {
        "role": "tool",
        "name": "get_bitcoin_price_usd",
        "content": "{\"price_usd\": 91337.42 }"
      }
    ],
    "tools": [
      {
        "type": "function",
        "function": {
          "name": "get_bitcoin_price_usd",
          "description": "Returns the current price of Bitcoin in USD.",
          "parameters": {
            "type": "object",
            "properties": {},
            "additionalProperties": false
          }
        }
      }
    ],
    "tool_choice": "auto"
  }'