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Scored across 12 tools
Tools mostly target distinct resources and actions: environment listing, connection setup/testing, graph listing/selection, schema retrieval, GQL validation, read execution, mutation execution, and rendering. However, nebula_render_graph is explicitly a legacy alias of nebula_render_result, and nebula_execute_query also renders results, creating mild ambiguity about when to use render_result separately. The descriptions mitigate but do not fully eliminate this overlap.
All 12 tools use consistent snake_case with a nebula_ prefix and a verb_noun pattern: list_environments, select_graph, execute_query, validate_gql, etc. There is no mixing of conventions or vague verb styles.
12 tools sit well within the 3-15 sweet spot for a graph database MCP. Each tool covers a distinct operational area (connection, environment, graph selection, schema, validation, execution, mutation, rendering) without excessive redundancy.
The surface covers connection and environment setup, graph listing and selection, schema retrieval, GQL validation, read query execution, mutation execution, and result rendering. Minor gaps exist for explicit graph creation/deletion or query cancellation, but the core query lifecycle is well covered and mutations may handle DDL.