What is a tool result?

A tool result is what comes back after the agent does something: the file contents, the output, or the error.

Navid Moazzezby Navid MoazzezUpdated Sept. 12, 20261 min read
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It is the only way the agent finds out what happened. It cannot see your screen and it does not know if something worked until the result arrives.

A tool that fails silently is worse than one that errors, because the agent carries on believing it succeeded.