So yeah, sealed search warrants may be illegal.
Probable cause: The officer should give reasonable information to support the possibility that the evidence of illegality will be found. Such information may come from the officer’ personal observations or that of an informant. If the warrant lacks accurate information as to what will be searched, the search is unlawful.
https://www.law.cornell.edu/wex/search_warrant
Trump FBI raid: Garland's DOJ faces growing pressure to release information on unprecedented search
Calls are growing for the Department of Justice to release information on its Monday raid at former President Trump's Florida home, as the agency remains silent on the unprecedented move two days later.
"The country deserves a thorough and immediate explanation of what led to the events of Monday," Senate Minority Leader Mitch McConnell, R-Ky., said Tuesday. "Attorney General Garland and the Department of Justice should already have provided answers to the American people and must do so immediately."
McConnell was joined in demanding an explanation from the DOJ by several other top Senate Republicans, former Democratic New York Gov. Andrew Cuomo, former Vice President Mike Pence, House Intelligence Committee Ranking Member Mike Turner, R-Ohio, and many more.
https://www.foxnews.com/politics/trump-fbi-raid-garlands-doj-faces-growing-pressure-release-information-unprecedented-search