action space

The set of resources an agent can use to perform a task. Action space might include the tools and APIs that the agent can invoke and the permissions the agent holds. In general, the action space should be just big enough for the agent to perform the task. If the action space is too small, the agent might have insufficient resources to perform the task. If the action space is too large, the agent tends to become more error prone.

Practitioners refer to action space when building, training, or evaluating machine learning systems. It appears in research papers, product documentation, and technical discussions about AI capabilities and limitations.