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Added 'Definitions' field to 'ToolInputSchema' #453

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Added 'Definitions' field to 'ToolInputSchema' #453

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11 changes: 8 additions & 3 deletions mcp/tools.go
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Original file line number Diff line number Diff line change
Expand Up @@ -516,9 +516,10 @@ func (t Tool) MarshalJSON() ([]byte, error) {
}

type ToolInputSchema struct {
Type string `json:"type"`
Properties map[string]any `json:"properties,omitempty"`
Required []string `json:"required,omitempty"`
Type string `json:"type"`
Properties map[string]any `json:"properties,omitempty"`
Required []string `json:"required,omitempty"`
Definitions map[string]ToolInputSchema `json:"$defs,omitempty"`
}

// MarshalJSON implements the json.Marshaler interface for ToolInputSchema.
Expand All @@ -535,6 +536,10 @@ func (tis ToolInputSchema) MarshalJSON() ([]byte, error) {
m["required"] = tis.Required
}

if len(tis.Definitions) > 0 {
m["$defs"] = tis.Definitions
}

return json.Marshal(m)
}

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