root/galaxy-central/tools/data_source/ucsc_proxy.xml

<?xml version="1.0"?>
<tool name="UCSC Main" id="ucsc_proxy">
        
        <description>table browser proxy</description>
        
        <command interpreter="python">
                ucsc_proxy.py $param_file $output
        </command>
        
        <inputs action="/ucsc_proxy/index" check_values="false">
                <display>go to UCSC $init $hgta_outputType</display>
                <param type="hidden" name="init" value="1"/>
                <param type="hidden" name="hgta_outputType" value="bed"/>
        </inputs>
        
        <code file="ucsc_filter.py"/>
        
        <outputs>
                <data name="output" format="bed" />
        </outputs>

</tool>