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Say that a ToolSpec without input_schema is a tool with no arguments #5

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Merged
HackTuah merged 1 commit into from
Sep 6, 2026
Merged

Say that a ToolSpec without input_schema is a tool with no arguments #5

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4 changes: 4 additions & 0 deletions README.md
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Expand Up @@ -74,6 +74,10 @@ held to cannot drift apart. Argument keys are derived from the schema's `propert
are passed through unchanged, because turning a string into a domain term is the host's job and
a generic layer that guesses has acquired someone else's domain.

A `ToolSpec` that omits `input_schema` is a tool with no arguments: it advertises an open
empty object, so `tools/call` refuses nothing and dispatch is handed `%{}` whatever the client
sent.

Validation is a deliberately small subset of JSON Schema — `type`, `properties`, `required`,
`additionalProperties`, and bounds. It refuses rather than guesses, and it is not a general
validator.
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