What is this credit score that you have? And how does it get depleted?

You're asking about the budget system shown in your message - specifically the tool call budget I operate under. Let me explain it clearly.

My Tool Call Budget

Each conversation I have is given a fixed budget of tool calls and model iterations. This is displayed in the <budget> block in your message:
Model calls: 0/19 used
Tool calls: task: 0/2, query_library_db: 0/10, fetch_image: 0/10 ...

What it tracks

ItemWhat it means
Model callsEach "think + act" cycle I perform counts as 1. I have 19 total per session.
Tool calls (per tool)Each time I invoke a specific tool (e.g. web_search, pubmed_search), it counts against that tool's limit.

How it gets depleted

  • Every time I search the web, that uses 1 of my 5 web_search calls.
  • Every time I look something up in a medical textbook, that uses 1 of my 10 query_library_db calls.
  • Every time I think and respond (even just to write text), that uses 1 of my 19 model calls.
  • Parallel tool calls (multiple tools fired at once) each count toward their own individual limits simultaneously.

Why it exists

This budget system is designed to:
  1. Control costs - each tool invocation consumes compute resources.
  2. Prevent runaway loops - it stops me from endlessly searching or iterating.
  3. Encourage efficiency - I should make smart, parallel calls rather than wasteful sequential ones.

What happens when it runs out?

If I exhaust a tool's budget, I can no longer use that tool for the rest of the conversation. If model calls run out, I stop being able to respond further in that session.
It's essentially a per-conversation resource meter - not a persistent "credit score" that carries across sessions. Each new conversation starts fresh with a full budget.

Oh, okay, so if I, my credit score decreases, I can start a new conversation, right?

Yes, exactly! Starting a new conversation resets the budget completely back to full.
A few things to keep in mind:
  • New conversation = fresh budget. All tool call limits and model call limits reset to their maximums.
  • Context is lost. When you start a new conversation, I won't remember anything from the previous one - no chat history carries over.
  • It's not really a "credit score" in the traditional sense - it's more like a per-session resource allowance. There's no penalty for running it down, and no reward for conserving it. It just resets.
So if you're in a long, tool-heavy conversation and notice the budget getting low, starting fresh is a perfectly valid move.
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