API:Objects#Finding/Filtering Objects documents the functions getObj(type, id) , findObjs(attrs) , filterObjs(callback) , and getAllObjs() . getObj will return the object you're looking for, but you need to already know the object's ID findObjs will return an array of objects that all have properties matching the parameter passed to the function filterObjs will return an array of objects that return true when passed to the callback function getAllObjs will return an array of every object in the campaign There's also Campaign() which will return the singleton Campaign object. In a chat:message event, you have access to the array of graphics selected by the user who triggered the message (with msg.selected), and you can pass IDs of graphic objects to a chat:message event using @{target|token_id} and @{selected|token_id}, or character objects if the tokens are linked to characters with @{target|character_id} and @{selected|character_id}.
