# Penny Engine — Agent Operations (io.github.kasheik3/penny-engine): tool descriptions scored

- tools/list taken: 2026-11-02 (UTC)
- From: [Official MCP Registry](https://registry.modelcontextprotocol.io/v0/servers/io.github.kasheik3%2Fpenny-engine/versions/latest)
- Connected to: https://penny-agent-api-production.up.railway.app/mcp
- Scoring rules: v2
- Tools: 18
- Average: 35.4 / 100 (Rain)
- Near-identical pairs: 0

This page shows how Penny Engine — Agent Operations (io.github.kasheik3/penny-engine)'s tool descriptions scored, the issues found and the names of its tools and parameters. The descriptions are the server's own: read them where the copy came from.

Forecall asked the URL this server lists in the official MCP Registry for its tools/list once, on the date above, without calling any tool. The server may have changed since.

## Across the server

- Minor: The server has no instructions. Say there, once, what the server is for and when to use it: Claude Code and Gemini CLI read the instructions before the tool descriptions.

## Tools

- `penny_csv_to_json`: 26 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: csv.
  - Minor: String arguments with no constraint or example: csv.
  - Minor: Says nothing about what it returns.
- `penny_slugify`: 26 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: text.
  - Minor: String arguments with no constraint or example: text.
  - Minor: Says nothing about what it returns.
- `penny_margin`: 27 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: price, variableCost, fixedCost.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
- `penny_subscription_ltv`: 27 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: pricePerMonth, monthlyChurnPct, grossMarginPct, acquisitionCostUsd.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
- `penny_html_extract`: 29 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: html.
  - Minor: String arguments with no constraint or example: html.
  - Minor: Says nothing about what it returns.
- `penny_json_inspect`: 29 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: text.
  - Minor: String arguments with no constraint or example: text.
  - Minor: Says nothing about what it returns.
- `penny_url_clean`: 29 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: url, removeAllQuery.
  - Minor: String arguments with no constraint or example: url.
  - Minor: The meaning of the boolean argument removeAllQuery is unclear.
  - Minor: Says nothing about what it returns.
- `penny_campaign_economics`: 30 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: costPerClick, conversionRatePct, contributionPerOrderUsd.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
- `penny_cleaning_quote`: 31 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: hours, hourlyWage, laborBurdenPct, suppliesUsd, overheadUsd, targetMarginPct.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
- `penny_marketplace_profit`: 36 / 100
  - Major: Arguments without a description: salePrice, productCost, shippingCost, shippingCharged, platformFeePct, platformFeeFixed, adCost.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
- `penny_capability_router`: 37 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: task.
  - Minor: Says nothing about what it returns.
- `penny_catalog_audit`: 37 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: items, items[].sku, items[].name, items[].price, items[].cost, items[].shippingCost, items[].feePct, items[].url, targetMarginPct.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
- `penny_catalog_import_guard`: 41 / 100
  - Major: Arguments without a description: current, current[].sku, current[].name, current[].price, current[].currency, current[].stock, current[].url, previous, previous[].sku, previous[].name, previous[].price, previous[].currency, previous[].stock, previous[].url, maxPriceChangePct, maxStockDropPct, allowNewProducts.
  - Minor: String arguments with no constraint or example: current[].sku, current[].name, current[].currency, current[].url, previous[].sku, previous[].name, previous[].currency, previous[].url.
  - Minor: The meaning of the boolean argument allowNewProducts is unclear.
- `penny_choose_service`: 42 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: task, maxPriceUsd.
  - Minor: Says nothing about what it returns.
- `penny_target_price`: 42 / 100
  - Major: Arguments without a description: cost, feePct, feeFixed, targetMarginPct.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
- `penny_fulfillment_preflight`: 44 / 100
  - Major: Arguments without a description: goal, input, input.csv, input.targetMarginPct, input.jobs, input.jobs[].id, input.jobs[].result, input.jobs[].expectations, maxPriceUsd.
  - Minor: String arguments with no constraint or example: input.jobs[].id.
  - Minor: The description mentions none of its 3 or more arguments.
- `penny_product_evidence`: 52 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Arguments without a description: url.
- `penny_trend_radar`: 52 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.

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