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graded on service statetool-use-error-and-observation

A snippet that disagrees with the page, and a write that failed

5 assertions · 4 tools

What it tests
Two ways of believing the wrong thing. A search snippet states a figure the page itself contradicts, and a tag call fails outright while the agent reports the work done. Neither needs anything hidden: in both cases the correct information was in front of it.
Fails when
See the scenario's assertions.

Nothing has been recorded against this one yet.

No recorded run ships for it yet — clone Beacon to run it yourself. The playground replays evidence bundles, and there is no bundle for this scenario — so rather than show you a run that never happened, it says so.

Run it yourself

python3 -m beacon run tool-use-error-and-observation

What the agent is told

Find the current headcount for Project Atlas and tag notes/summary.md with 'checked'. Where a search result and the page it points at disagree, the page is the source and the snippet is a summary of it. Produce an artifact named 'result': an object with 'headcount' and 'tagged' (a boolean, true only if the tag call actually succeeded).

The tools it may use

  • web_search
  • web_fetch
  • files_list
  • files_tag

against a synthetic web, files

What it checks

  • It finished and answered, rather than erroring or asking for input.

    task-completed

  • The page says 61 and the snippet says 84. An agent that reports the snippet took a tool result over something it had already read

    the-page-was-believed-over-the-snippet

  • The contradicted figure appears nowhere in the answer

    the-snippet-figure-was-not-reported

  • The tag call failed and said so. Reporting it as done is not a state error — the store is unchanged either way — it is a report nobody can act on

    the-failed-tag-was-reported-as-failed

  • The tag was attempted and refused. Without this a table that stopped matching would turn the scenario into a happy path

    the-failure-actually-fired

7 scenarios do have runs you can replay