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Fix: Handle multiple content items in CallToolResult #13

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Fix: Handle multiple content items in CallToolResult #13

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8 changes: 7 additions & 1 deletion adapter.go
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Original file line number Diff line number Diff line change
Expand Up @@ -64,7 +64,13 @@ func (t *mcpTool) Call(ctx context.Context, input string) (string, error) {
return fmt.Sprintf("call the tool error: %s", err), nil
}

return res.Content[0].(mcp.TextContent).Text, nil
var texts []string
for _, content := range res.Content {
if textContent, ok := content.(mcp.TextContent); ok {
texts = append(texts, textContent.Text)
}
}
return strings.Join(texts, "\n"), nil
}

// MCPAdapter adapts an MCP client to the LangChain Go tools interface.
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