http://programmer.ie/tags/mcp/ Recent content in MCP on Programmer.ie Hugo en-us Sat, 08 Aug 2026 17:09:00 +0100 http://programmer.ie/books/agents-from-first-principles/07-chapter/ Sat, 08 Aug 2026 17:09:00 +0100 http://programmer.ie/books/agents-from-first-principles/07-chapter/ <p>Every mechanism built so far has taken the action set as given. The action boundary validates a proposal against a fixed list of permitted action types. Candidate generation samples several proposals from the same list. The runtime-state chapter watches what happens after execution and decides whether to continue. All of them assume that somebody, somewhere, already decided which capabilities the policy could choose from.</p> <p>Nobody did. That decision is the subject of this chapter, and it is a design decision with consequences as large as any of the mechanisms around it.</p>