JSON null unmarshals into an empty string, so the presence-only
key check let {"input":null} through, running the nested agent
with a blank user message.
Signed-off-by: Bryan Frimin <bryan@getprobo.com>
jsonSchemaFor panicked on unsupported types, which meant
FunctionTool, NewOutputType, and RunTyped would crash the
process during setup rather than returning a normal error.
Signed-off-by: Bryan Frimin <bryan@getprobo.com>
The agentTool.Execute method accepted {} despite the schema
marking input as required. Unlike functionTool, it skipped
required-field validation, silently sending an empty message
to the sub-agent.
Signed-off-by: Bryan Frimin <bryan@getprobo.com>
