irs-taxpayer-mcp
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TDQS
Scored across 44 tools
Many tools are individually well-described, but the set has significant boundary overlap: calculate_total_tax, generate_full_tax_report, generate_tax_plan, run_tax_health_check, and simulate_tax_scenario all perform broad tax computations. Also, get_tax_deadlines vs get_personalized_tax_calendar and get_state_tax_info vs estimate_state_tax create ambiguity. An agent would struggle to reliably pick the right tool for a general tax question.
The vast majority of tools follow a consistent snake_case verb_noun pattern such as calculate_federal_tax, list_tax_credits, compare_state_taxes, and analyze_paycheck. The main deviations are noun-phrase names like standard_vs_itemized and what_changed_between_tax_years, plus inconsistent use of calculate vs estimate for similar operations. Overall the convention is still predictable and readable.
At 44 tools, this server is well into the 'too many' range and far beyond the typical well-scoped MCP surface. While the tax domain is broad, many tools are narrow one-off calculators that could be consolidated into parameterized tools, reducing cognitive load without losing capability.
The tool set is unusually comprehensive for individual taxpayer assistance, covering federal and state tax calculation, credits, deductions, W-4 withholding, quarterly estimates, retirement, capital gains, relocation, audit risk, and forms/deadlines. Minor gaps include no actual return preparation or filing submission, no explicit AMT tool, and unsupported state-year calculation paths. These are workable limitations rather than dead ends.