MCP server for interacting with Weaviate vector database, enabling insertion and querying of data
Two tools with basic schemas and descriptions, but significant gaps in parameter documentation and output specification. Tool names lack clear action verbs (weaviate-insert-one uses hyphenated format; weaviate-query is generic). Descriptions are minimal (10-30 chars) and lack context on when to use each tool or what they return. Parameter descriptions exist but are sparse. No documented output schemas, error handling guidance, or recovery paths. Missing idempotency hints for the write operation. No pagination support despite potential for large result sets.
Insert a single object into a Weaviate collection
Query data within Weaviate using hybrid search
Tool descriptions are too short (10-30 chars) and lack context. 'Insert a single object into a Weaviate collection' and 'Query data within Weaviate using hybrid search' do not explain WHEN to use each tool, what the return value contains, or how to handle errors.
No output schema documented. Callers cannot know what fields to expect from results. weaviate-insert-one returns a UUID string; weaviate-query returns unstructured text. LLMs need structured output to chain tools and extract data reliably.
weaviate-query lacks pagination support (no limit, offset, or cursor parameters). Large result sets will blow context windows. Tool description does not state result limits or pagination strategy.
| Scored | Grade | Overall | Spec posture | Rubric |
|---|---|---|---|---|
| 2026-09-23 | F | 36 | 2026-07-28+ | v2 |
Tool names do not follow verb_noun convention. 'weaviate-insert-one' uses hyphens and is awkward; 'weaviate-query' is generic and does not distinguish from other query tools. Should be 'insert_object' and 'search_objects' or similar.
No error handling guidance. If insert fails or query returns no results, LLMs have no recovery path. Error responses should explain what went wrong and suggest next steps (e.g., 'Collection not found. Call list_collections() to see available options.').