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A Model Context Protocol server for MongoDB connections
MongoDB server has 12 tools with complete input schemas and basic descriptions. All tools follow verb_noun naming (find, insertOne, updateMany, etc.). Descriptions are present but generic, most are 40-80 chars, below the 194-char baseline for A+ tools. Parameters have types and descriptions, but lack constraints (enums, ranges, patterns). No output schemas documented. Error handling is absent, no recovery guidance, categorization, or actionable error messages. Missing tool annotations (readOnlyHint, destructiveHint). Composition is sound: tools are single-responsibility and chainable. Security: no secrets in params (good), but no permission gates or audit logging visible.
Run an aggregation pipeline on a MongoDB collection
Count documents in a MongoDB collection
Delete multiple documents from a MongoDB collection
Delete a single document from a MongoDB collection
Get distinct values for a field in a MongoDB collection
Query documents from a MongoDB collection
Find a single document in a MongoDB collection
Insert multiple documents into a MongoDB collection
Insert a single document into a MongoDB collection
Descriptions are generic and under-length. Most tool descriptions are 40-80 chars; baseline for A+ is 194 chars. Descriptions lack WHEN to use, prerequisites, or state-modification warnings. E.g., 'Insert a single document' does not explain idempotency, return value, or error recovery.
No output schemas documented. LLMs cannot plan downstream calls or extract fields without knowing return structure. E.g., does find() return {documents: [], count: 0} or {data: [], total: 0}?
Inferred effective spec: <=2025-11-25.
| Scored | Grade | Overall | Spec posture | Rubric |
|---|---|---|---|---|
| 2026-09-23 | F | 47 | <=2025-11-25 | v2 |
Replace a single document in a MongoDB collection
Update multiple documents in a MongoDB collection
Update a single document in a MongoDB collection
No input constraints (enums, ranges, patterns). 'limit' and 'skip' accept any number, LLMs may pass negative, zero, or absurdly large values. 'filter' and 'update' are untyped objects with no validation hints.
No error handling or recovery guidance. No tool returns actionable error messages. Destructive tools (deleteOne, deleteMany) lack confirmation or dry-run support.
Missing tool annotations. No readOnlyHint, destructiveHint, or idempotentHint. LLMs cannot distinguish safe reads from destructive writes without explicit metadata.