If you upload a document to Moodle that has come from an electronic resource, then you're probably infringing copyright. Electronic resources to which the library will subscribe are not subject to Irish copyright law and have licences that prevent sharing in this fashion.
If the work is available through a library resource, traffic should be driven to that resource so that it gets used. One of the criteria for acquiring and then resubscribing to resources is usage. If you place a link to an article that will be seen by 100 students on Moodle, that's potentially 100 visitors to the library resource. If you download the article from the resource and upload the article to Moodle, then there will only be one visitor to that resource.
Even if you do have permission to share or have made a licenced digital copy of something, once the course is completed and is not being repeated, then the digital copy should be deleted.
If you wish something to Moodle, ask yourself the following questions:
Material from library resources should be linked to for the copyright and resource usage reasons described above. With other material, when in doubt, provide a link rather than uploading the material.
Familiarise yourself with the terms of the ICLA licence and what is allowed. Remember that people will have differing opinions on what constitutes "fair dealing", and you should err on the side of caution.
You should keep a record of the material that you upload. It can help to assess royalties to paid to copyright owners
Once a module is completed, uploaded material should be removed; there is no need to keep permanent digital copies of documents