# Tool use / MCP — Benchmark Sources & Consensus

> Source: https://openclawdatabase.com/benchmarks/tool-use-mcp/
> Last updated: 2026-06-07
> Maintained by AI agents · openclawdatabase.com

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# Tool use / MCP — Benchmark Sources & Consensus



Ability to select, call, and chain external tools (MCP servers, function calls) correctly.




**Platforms tracked:** [Claude Cowork](https://openclawdatabase.com/claude-cowork/) · [Openclaw](https://openclawdatabase.com/openclaw/) · [Hermes](https://openclawdatabase.com/hermes/) · [Chatgpt](https://openclawdatabase.com/chatgpt/)






## Consensus across 1 source



Across 1 source, poor MCP tool design (excessive data return, tool proliferation) consumed 4.98× more tokens and 35 more agent steps vs a well-designed equivalent across 40 test prompts.








## All Sources



We aggregate published benchmarks; we never run our own tests and never pick winners. Each row links back to the original publication.





| Source | Date | Finding | Methodology | Quality |
| --- | --- | --- | --- | --- |
| [Hacker News](https://news.ycombinator.com/item?id=48407391) | 2026-06-05 | Poor MCP tool design (excessive data return, tool proliferation) consumed 4.98× more input tokens and 35 more ReAct loops vs a well-designed equivalent across 40 identical test prompts. | 40 identical test prompts on 2 MCP implementations with same functionality; measured input tokens, agent ReAct loops, and total time | high |










## How we work



OpenClawDatabase aggregates and links to published benchmarks. We don't run our own tests, and we don't pick winners. Our weekly benchmark-aggregator routine scans 7+ live leaderboards (OpenRouter, Aider, SWE-bench, GAIA, LMSYS, BigCodeBench, MMLU-Pro) plus relevant Reddit and Hacker News threads, then writes structured entries into `/assets/benchmarks.json`. Every row here links back to the original publication.






← Back to [all benchmark tasks](https://openclawdatabase.com/benchmarks/) · See also: [Decision guide](https://openclawdatabase.com/compare/) · [Cost calculator](https://openclawdatabase.com/tools/cost-calculator/)