Agent Design

How you actually build AI agents that work. Architectures, tool use, memory patterns, and the frameworks worth paying attention to.

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ComplexMCP Finds Tool-State Gaps

ComplexMCP Finds Tool-State Gaps

ComplexMCP is a useful benchmark because it tests the part of tool use that simple function-calling tasks avoid: one action changes the state that the...

4 min read
ToolGrad Turns Tool Failures Into Data

ToolGrad Turns Tool Failures Into Data

Google's ToolGrad reframes tool-use training data as an execution problem before it is a prompt-writing problem. Instead of asking a model to invent a...

4 min read
Can Next-Turn Metrics Test Workflows?

Can Next-Turn Metrics Test Workflows?

The paper *When Better Turns Do Not Make Better Agents* tests a quiet failure in agent evaluation: a model can improve at predicting the next local action...

5 min read
Hyper-Tau Bench Tests Agent Building

Hyper-Tau Bench Tests Agent Building

Hyper-Tau Bench changes the unit of evaluation from an agent using tools to a coding system building a deployable customer-service agent [Hyper-Tau...

5 min read
Mid-Range Tasks Cut Agent Eval Cost

Mid-Range Tasks Cut Agent Eval Cost

Efficient Benchmarking of AI Agents asks a practical release question: can teams compare agent systems without rerunning every expensive interactive task...

4 min read
Messier Maps Agent Benchmark Drift

Messier Maps Agent Benchmark Drift

Messier, revised on 30 August 2026, treats agent evaluation as a data-integration problem rather than another leaderboard race...

5 min read
Tool Parallelism Has A Scheduling Problem

Tool Parallelism Has A Scheduling Problem

PeakBench is a useful benchmark because it tests a failure that rarely appears in tool-use leaderboards: an agent can choose the right calls, respect the...

6 min read
VAKRA Shows API Reasoning Decay

VAKRA Shows API Reasoning Decay

VAKRA is an August 2026 benchmark for checking whether systems can reason across APIs, retrieved documents and natural-language tool policies in one...

4 min read
ScrambleToolBench Finds Tool-Map Inertia

ScrambleToolBench Finds Tool-Map Inertia

ScrambleToolBench is a 3 August 2026 benchmark for a practical tool-use failure: a system can learn what hidden tools do, then fail to revise that map...

4 min read
ParEvalLayer Makes Partial Evals Decidable

ParEvalLayer Makes Partial Evals Decidable

ParEvalLayer is a 3 August 2026 proposal for a practical agent-evaluation problem: teams often see early task outcomes before a full benchmark run...

4 min read
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