What we see in the summary of discussions of the meeting is that the public is not trusted to know what the committee is working on in detail.
Take the summary of agenda item 5:
"The meeting reached consensus on the Presidency proposal (doc. 8852/10 COSI 24 ASIM 48 FRONT 57 COMIX 321) regarding the involvement of COSI in the implementation of 5 out of the 29 measures set out in the above-mentioned Council Conclusions. The COSI Support Group was invited to submit to the next COSI meeting concrete proposals for COSI's involvement in the identified measures and delegations were invited to indicate their willingness to participate in the elaboration and implementation of these proposals."In this summary, we are directed to a non-public "Presidency proposal" (I've added the link) that seems to give guidance on how to deal with 29 measures proposed by the Council in February (see the Council conclusions).
But instead of telling us which are the 5 of the 29 measures to will be dealt with, COSI keeps it secret from us.
In other words: The ministers have agreed on a public list of 29 measures regarding FRONTEX, but the non-elected officials sitting in COSI keep secret from us what they are doing with these measures. Brilliant!