Action Blocks in MCP
Encapsulating Thoughts and Intent Action blocks represent a model’s decision at a given point in its reasoning loop. Rather than producing only a final answer, the model under MCP generates intermediate actions that reflect its plan. Each action block contains structured metadata describing what the model intends to do next. This can include calling a tool, representing clarification, storing an observation, or generating final output. For example, an agent tasked with summarizing documents might produce this action block: This tells…