Java can't find other jar files in the same directory without you explicitly telling it to. If you were running alchemy with:
java -jar alchemy.jar
Then you need to set the classpath to tell it where the other jar files are. Eg, if your "tools" are `foo.jar` and `bar.jar` run:
java -classpath "foo.jar:bar.jar" -jar alchemy.jar
If you need to add an entire directory (`tools`) you can:
java -classpath "tools/*" -jar alchemy.jar