The noise channels will return a random number from 0 to 1 based on different conditions. You can easily combine this value with fuzzy logic to make your output randomize.

Channels

The channel noise.id will sentence (Noise ID) rand float based on my id will return a random number based on agent ID.

Each agent has a an unique ID in scene once it was placed out.
The channel noise.time will return a random number based on current frame number.
The the value range of the returned random number is from 0 to 1, a float point number. 

Usage Example

Randomize speed

...

Randomize Actions

Random action

Reseed

If you need use this sentences in different places and with different seed, you need use this sentence:

rand float based on my id with seed:???