
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
If the function $f(x) = 2\sin(2x + \varphi)$ $(0 < \varphi < \frac{\pi}{2})$ passes through the point $(0, \sqrt{3})$, then the decreasing interval of $f(x)$ on $[0, \pi]$ is \_\_\_\_\_\_.

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