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Get Started Free →This skill should be used when user asks to "query MongoDB", "show database collections", "get collection schema", "list MongoDB databases", "search records in MongoDB", or "check database indexes".
.claude/skills/microck-mongodb-usage/SKILL.md| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-04 | ✗→✓ | ▲ Improved | -25% | 0% |
| case-05 | ✗→✓ | ▲ Improved | -27% | 0% |
| case-06 | ✗→✓ | ▲ Improved | -18% | 0% |
| case-08 | ✗→✓ | ▲ Improved | -31% | 0% |
| case-09 | ✗→✓ | ▲ Improved | -58% | 0% |
Use the MongoDB MCP server to integrate database queries into workflows.
MongoDB MCP is configured in read-only mode. Only queries and data retrieval are supported. No write, update, or delete operations.
Use mcp__mongodb__* tools for:
mcp__mongodb__list_databasesmcp__mongodb__list_collectionsmcp__mongodb__get_collection_schemaMongoDB MCP requires:
MONGODB_URI - Connection string (mongodb://...)Configure in shell before using the plugin.
| Case | Status | Duration (ms) | Turns | Tokens | Tool calls | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Without | With | Δ | Without | With | Δ | Without | With | Δ | Without | With | Δ | ||
case-01 | fail→fail | 11,073 | 3,724 | -66% | 1 | 1 | 0% | 1,939 | 419 | -78% | 0 | 0 | — |
case-02 | fail→fail | 7,976 | 5,207 | -35% | 1 | 1 | 0% | 1,372 | 457 | -67% | 0 | 0 | — |
case-03 | fail→fail | 12,963 | 2,723 | -79% | 1 | 1 | 0% | 1,994 | 352 | -82% | 0 | 0 | — |
case-04 | fail→pass | 6,109 | 6,943 | +14% | 1 | 1 | 0% | 1,095 | 821 | -25% | 0 | 0 | — |
case-05 | fail→pass | 9,955 | 5,879 | -41% | 1 | 1 | 0% | 1,595 | 1,171 | -27% | 0 | 0 | — |
case-06 | fail→pass | 7,333 | 5,084 | -31% | 1 | 1 | 0% | 1,224 | 1,002 | -18% | 0 | 0 | — |
case-07 | pass→pass | 13,523 | 7,448 | -45% | 1 | 1 | 0% | 2,017 | 1,389 | -31% | 0 | 0 | — |
case-08 | fail→pass | 10,939 | 5,647 | -48% | 1 | 1 | 0% | 1,531 | 1,062 | -31% | 0 | 0 | — |
case-09 | fail→pass | 6,268 | 1,373 | -78% | 1 | 1 | 0% | 1,014 | 428 | -58% | 0 | 0 | — |
case-10 | pass→pass | 13,673 | 6,792 | -50% | 1 | 1 | 0% | 2,152 | 1,234 | -43% | 0 | 0 | — |
case-11 | pass→pass | 9,951 | 5,565 | -44% | 1 | 1 | 0% | 1,673 | 1,188 | -29% | 0 | 0 | — |
case-12 | fail→pass | 6,250 | 1,602 | -74% | 1 | 1 | 0% | 1,018 | 468 | -54% | 0 | 0 | — |
case-13 | fail→pass | 7,582 | 1,938 | -74% | 1 | 1 | 0% | 812 | 535 | -34% | 0 | 0 | — |
case-14 | fail→pass | 5,039 | 3,604 | -28% | 1 | 1 | 0% | 776 | 575 | -26% | 0 | 0 | — |
case-15 | fail→pass | 8,667 | 4,440 | -49% | 1 | 1 | 0% | 1,318 | 1,041 | -21% | 0 | 0 | — |
case-16 | fail→pass | 4,717 | 1,741 | -63% | 1 | 1 | 0% | 891 | 462 | -48% | 0 | 0 | — |
case-17 | fail→pass | 9,809 | 3,249 | -67% | 1 | 1 | 0% | 1,481 | 671 | -55% | 0 | 0 | — |
case-18 | fail→pass | 4,767 | 1,816 | -62% | 1 | 1 | 0% | 771 | 510 | -34% | 0 | 0 | — |
case-19 | pass→pass | 8,495 | 2,465 | -71% | 1 | 1 | 0% | 1,210 | 570 | -53% | 0 | 0 | — |
case-20 | pass→pass | 6,150 | 2,570 | -58% | 1 | 1 | 0% | 1,023 | 529 | -48% | 0 | 0 | — |
case-21 | pass→pass | 2,892 | 1,936 | -33% | 1 | 1 | 0% | 437 | 493 | +13% | 0 | 0 | — |
case-22 | fail→pass | 12,082 | 7,282 | -40% | 1 | 1 | 0% | 1,931 | 1,502 | -22% | 0 | 0 | — |
DecimalAI ran this skill against gemini-3.6-flash twice over the same eval suite — once with the skill loaded and once without — and compared the two runs case by case. 22 cases were attempted, and 19 counted toward the lift figure. The other 3 produced results that are not comparable between the two arms, so they are excluded from the headline rather than averaged into it. The headline lift of +59 percentage points is the difference between those two pass rates over the 19 comparable cases.
Without the skill loaded, the model failed this case. With it loaded, the same prompt on the same model passed. This is one improved case from the latest verified run; every case, including any that regressed, is in the table above.
Other measured skills in the registry, with their headline benchmark lift.