Problems / Agents and tools, medium

Agents burn the token quota

Each step sends 3,000 tokens of context. Agents make 24 model calls a second against a 3-million-token-a-minute quota.

Free to open. Runs in your browser, no sign-up.

Your goals

Success ≥ 95% of tasks, p99 ≤ 90 s.

The traffic

4 requests a second for 45 seconds: 100% task (writes).

The system

What each component does in this design, and what calls it. The simulator mimics each one from these settings.

ComponentIts job hereSettings
Load balancerLoad balancerTraffic enters here.Calls Agent API.Layer 4 balancers route by IP and port; layer 7 balancers read HTTP and can route by path or header.–
Agent APIApp serviceLoad balancer forwards to it.Calls Agent orchestrator.Little's law: throughput ≈ concurrency ÷ latency. 200 slots at 50 ms serve about 4,000 req/s.3 replicas × 500 slots · timeout 180 s
Agent orchestratorAgent orchestratorAgent API calls it.Calls Model, MCP tool servers.An agent loops: think, call a tool, read the result, repeat until done.400 slots · 6 steps
ModelLLM endpointAgent orchestrator calls it.Latency has two parts: time to the first token, then a steady stream of tokens per second.300 streams · 3M input tokens/min
MCP tool serversTool / MCP serverAgent orchestrator calls it.Tools give the model actions such as search or database queries; each call is another round trip.200 slots

Hints

Try it first. Open one hint at a time if you get stuck.

Hint 1

24 × 3,000 × 60 ≈ 4.3 million tokens a minute.

Hint 2

The system prompt and tool definitions repeat every step.

One way to solve it

Prefix caching for the repeated context.

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