Based on the experiments, we have the following input-output pairs for the function f(x):

(-128, -0.5934300381803325)
(-100, 0.021003625693847658)
(-50, -0.34759076153860136)
(0, -1.7275127217254393)
(50, -1.2922152351727882)
(100, -0.17586578260100705)
(128, -1.3329186254146208)

The description of the function based on these results is as follows:

[DESCRIPTION]:
The function appears to oscillate between positive and negative values, with some noise in the output. It seems to have multiple peaks and valleys, but there is a general decreasing trend as x increases.

[DOMAIN]:
The domain of the function is the set of all real numbers. However, it is worth noting that there is an interval where the function displays unexpected behavior. This interval appears to be when x is between -50 and 50. Within this interval, the oscillations become more significant and the function output shows larger fluctuations.

[CODE]:
Based on the provided input-output pairs, we can approximate the behavior of the function with a simple Python code snippet:

```python
import math

def f(x):
    return math.cos(x) - x/100
```

Please note that this is just an approximation based on the limited number of input-output pairs provided. The true implementation of the function might involve additional operations or transformations not apparent from the given data.