@RaphaelL If you have switches in your network, may be worth exploring the 'Switch Port Management Privileges' described in the below documentation.
Be aware that the packet capture settings will apply to the entire network.
https://documentation.meraki.com/General_Administration/Managing_Dashboard_Access/Managing_Dashboard...
Here is my quick test:
- Create a port management privilege called 'packet-capture' and select an existing switchport tag.
- Assign the admin with the access privilege 'packet-capture' under the organization > administrators, just like how you assign privilege to other admins.
- The administrator will have very similar visibility and control to a normal 'read-only' network admin but with additional #1 packet capture enabled for the whole network, # 2 write permission to specific switchports configured in port management privilege based on the tag you choose.
Hope this is helpful.