# mcp > MCP tool/resource guidance and parity rules with gRPC - Author: Louis Branch - Repository: louisbranch/fracturing.space - Version: 20260207182742 - Stars: 0 - Forks: 0 - Last Updated: 2026-02-07 - Source: https://github.com/louisbranch/fracturing.space - Web: https://mule.run/skillshub/@@louisbranch/fracturing.space~mcp:20260207182742 --- --- name: mcp description: MCP tool/resource guidance and parity rules with gRPC user-invocable: true --- # MCP Development Guidance for MCP tool and resource changes. ## Core Rules - MCP is a thin transport wrapper; state and rules live in gRPC/domain packages. - Keep gRPC and MCP APIs in parity. - When adding MCP tools, update `internal/test/integration/fixtures/blackbox_tools_list.json`. - Tool exposure should align with the campaign's game system (dynamic exposure is a future requirement).