THE ACTORS
SECTION 02
ISSUE 001
Tool Marketplaces Need Capability Contracts
Projection: Current MCP servers standardize tool access; A2A standardizes agent interoperability. A marketplace could make each tool’s schema, permission surface, price, side effects, and reliability machine-readable. Timing is uncertain, and the market remains unsafe if an agent can discover a tool without also discovering its operational contract.
Why this idea is here
What the evidence establishes.
Google Cloud adds current MCP servers connecting agents to cloud data and services through a standard interface; The A2A community releases v1.0 as a stable, production-ready agent-interoperability standard that complements tool-and-context protocols. These are source-backed premises for this projection; they do not by themselves prove broad adoption or the eventual outcome.
Source ledger
Read the sources.
- S01Current Model Context Protocol documentation
official live protocol documentation / dated Live source · verified 2026-07-10 / retrieved 2026-07-10
- S02A2A Protocol v1.0: production-ready agent interoperability
official current protocol release / dated Live source · verified 2026-07-10 / retrieved 2026-07-10