But the FIA declared McLaren's actions "entirely legitimate and reasonable".
It added that it was "standard procedure for a team to tell its drivers to slow down when they have a substantial lead" and "entirely reasonable to ask the drivers not to put each other at risk".
"McLaren were able to pursue an optimum team strategy because they had a substantial advantage over all other cars.
"They did nothing which could be described as interfering with the race result."
McLaren's decision to call the Englishman in apparently early for his second stop, which also seemed to prevent him challenging Alonso's position, was also questioned.
Fernando Alonso leads Lewis Hamilton during the Monaco Grand Prix
Hamilton was unhappy at not being allowed to challenge Alonso
But the FIA said: "With no safety car during Alonso's first stint, there was a small but finite risk that it would come out during the five laps before Hamilton had to refuel.
"This would have put him behind the field and at a significant disadvantage to any car on a full (as opposed to optional) one-stop strategy.
"The latter cars would be expected to refuel around lap 40 - ie after the safety car had pitted if it came out during Hamilton's extra laps.
"For similar reasons, Hamilton was called in early for his second pit stop, thus assuring his second place, with or without the safety car."
The FIA statement continued: "Had the car in front of Hamilton not been his team-mate, McLaren might (probably would) have decided to risk the safety car and let Hamilton run for as long as his fuel allowed in the hope he would come out of the pits in the lead after one of his pit stops.
"There is, however, no obligation on them to take this risk in order to overtake their own car. Indeed it would be foolish to do so."
The FIA examined radio communications between McLaren and their drivers, data from the team and a report from the official observer before coming to its conclusions.
Bookmarks