
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Given $f(x)= \sqrt {3}\sin ^{2}x+\sin x\cos x- \frac { \sqrt {3}}{2}$.  
(I) Find the intervals of increase for $f(x)$.  
(II) In $\triangle ABC$, $A$ is an acute angle and $f(A)= \frac { \sqrt {3}}{2}$, $a=2$, find the maximum perimeter of $\triangle ABC$.

Present the answer in LaTex format: \boxed{Your answer}
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