Time out

[BillyMac]

Originally Posted by Nevadaref

There is a case book play stating to penalize a verbal fake with a violation, such as one player telling an opponent to switch lane spaces after the shooter has the ball.

9.1.3 SITUATION B: While A1’s free-throw attempt is in flight toward the basket:
(a) B1; or (b) A2, in a marked lane space, fakes by rocking forward causing
an opponent to enter the lane prematurely. RULING: In (a), the official will use the
proper signal indicating a violation by B1 and a substitute free throw is awarded
if A1’s attempt is unsuccessful. If it is successful, the violation is ignored. In (b),
the official will sound his/her whistle immediately when A2 violates. The violation
cancels A1’s attempt and it is B’s ball for a throw-in, unless an additional free
throw(s) is involved. COMMENT: If a player uses verbal tactics like “you’re in my space”
or a time-out request to fake an opponent into violations, only the fake is
penalized. (9-1-3b Penalty 1, 4d)

[Nevadaref]

Originally Posted by BillyMac

9.1.3 SITUATION B: While A1’s free-throw attempt is in flight toward the basket:
(a) B1; or (b) A2, in a marked lane space, fakes by rocking forward causing
an opponent to enter the lane prematurely. RULING: In (a), the official will use the
proper signal indicating a violation by B1 and a substitute free throw is awarded
if A1’s attempt is unsuccessful. If it is successful, the violation is ignored. In (b),
the official will sound his/her whistle immediately when A2 violates. The violation
cancels A1’s attempt and it is B’s ball for a throw-in, unless an additional free
throw(s) is involved. COMMENT: If a player uses verbal tactics like “you’re in my space”
or a time-out request to fake an opponent into violations, only the fake is
penalized. (9-1-3b Penalty 1, 4d)

That's the one and provides clear rules direction on how to handle this situation. That is exactly what the coach did in the OP.

[Raymond]

Originally Posted by BillyMac

9.1.3 SITUATION B: While A1’s free-throw attempt is in flight toward the basket:
(a) B1; or (b) A2, in a marked lane space, fakes by rocking forward causing
an opponent to enter the lane prematurely. RULING: In (a), the official will use the
proper signal indicating a violation by B1 and a substitute free throw is awarded
if A1’s attempt is unsuccessful. If it is successful, the violation is ignored. In (b),
the official will sound his/her whistle immediately when A2 violates. The violation
cancels A1’s attempt and it is B’s ball for a throw-in, unless an additional free
throw(s) is involved. COMMENT: If a player uses verbal tactics like “you’re in my space”
or a time-out request to fake an opponent into violations, only the fake is
penalized. (9-1-3b Penalty 1, 4d)

To use the words of another esteemed member, doesn't exactly cover the OP but it's close enough for me to use.