Schema | nebula-mcp

nebula-mcp

Describes the environment variables required to run the server.

Name	Required	Description	Default
`NEBULA_MAX_ROWS`	No	Maximum number of result rows to include in the MCP context. Does not prevent the database from computing large results.
`NEBULA_PASSWORD`	Yes	Password for the NebulaGraph database. Required. Note: stored in plaintext in ~/.codex/config.toml by Codex Desktop.
`NEBULA_USERNAME`	Yes	Username for the NebulaGraph database. Required.
`NEBULA_ADDRESSES`	Yes	One or more HOST:PORT addresses of the NebulaGraph database. Required.
`NEBULA_ALLOW_MUTATIONS`	No	Set to 'true' to allow mutation statements via the dedicated nebula_execute_mutation tool. Defaults to 'false'.	false
`NEBULA_CONNECT_TIMEOUT_MS`	No	Connection timeout in milliseconds. Recommended: 30000.	30000
`NEBULA_REQUEST_TIMEOUT_MS`	No	Per-request timeout in milliseconds for individual query execution.

Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.

This server publishes no instructions, or was last inspected before Glama recorded them.

Features and capabilities supported by this server

Protocol revision2025-11-25

Capability	Details
`tools`	{ "listChanged": false }
`prompts`	{ "listChanged": false }
`resources`	{ "subscribe": false, "listChanged": false }
`experimental`	{}

Functions exposed to the LLM to take actions

Name	Description
nebula_test_connectionA	Test the configured YueShu connection and return only redacted settings.
nebula_list_graphsA	List persistent graphs before choosing schema and graph context.
nebula_get_graph_schemaC	Read a Graph Type schema; optionally include a UTF-8 byte-bounded DDL string.
nebula_validate_gqlA	Validate YueShu 5.3 GQL for placeholders, dialect residuals, policy, and optional EXPLAIN. This never executes the original statement.
nebula_execute_queryA	Execute one approved read-only GQL statement and optionally return table, cytoscape-elements-v1 graph, deterministic analysis, and vega-lite-v5 charts.
nebula_execute_mutationA	Execute one mutation only when NEBULA_ALLOW_MUTATIONS=true and confirm_mutation=true. This tool is destructive and returns no charts.

Interactive templates invoked by user choice

Name	Description
No prompts

Contextual data attached and managed by the client

Name	Description
`nebula-connection`	Redacted YueShu connection status and server version.

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