Improving MCP tools

An MCP server gets better only in ways you can measure. This skill is the campaign procedure: score the current agent experience, fix the biggest problem, re-score, and only ship changes the numbers justify. It is the operating manual for the "improve my MCP" loop — one iteration per pass, journaled so a later iteration (or a different agent) can resume without repeating work.

The objective function

services/mcp/evals/ is the harness. benchmark/tasks.yaml is a fixed set of agent tasks with expected_tools and success_criteria; scores are only comparable across runs of the same benchmark version.