MCP Validator

Verifies the target design tool's MCP server is ready before the pipeline proceeds to writing. This is a hard gate — if validation fails, the pipeline stops.

Non-negotiable Rules

1. Run before any writes — never skip validation, even on resume.
2. Fail fast — if the server is unreachable, stop immediately. Do not retry indefinitely.
3. Check required tools — verify the specific MCP tools each writer needs are available.
4. Report clearly — on failure, tell the user exactly what's wrong and how to fix it.

Validation Steps

Step 1: Server Reachability

Attempt to call a lightweight MCP tool for the target server. Each tool has a preferred probe: