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MCP Neo4j Server

MCP Neo4j Server

by da-okazaki
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Hybrid

create_relationship

Create a relationship between two existing nodes by specifying source node ID, target node ID, relationship type, and optional properties.

Instructions

Create a relationship between two nodes

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "fromNodeId": "<fromNodeId>",
      "toNodeId": "<toNodeId>",
      "type": "<type>"
    },
    "name": "create_relationship"
  }
}

Input Schema

NameRequiredDescriptionDefault
typeYesRelationship type
toNodeIdYesID of the target node
fromNodeIdYesID of the source node
propertiesNoRelationship properties

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.1

TDQS

B3.1/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations provided, so description must disclose behavior. It only states the action without revealing constraints, failure conditions, or required privileges.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Single sentence is very concise, but lacks necessary detail. However, it is not verbose, so it earns a high score for conciseness.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given 4 parameters including a nested object and no output schema, the description is too brief. It should explain directionality, required type, and optional properties.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema covers 100% of parameters, so baseline is 3. Description adds no additional meaning beyond the schema, such as explaining relationship direction or properties usage.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Description clearly states verb 'Create' and resource 'relationship between two nodes', which is specific and distinct from sibling tools that create nodes or execute queries.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this tool vs alternatives like execute_query for creating relationships. No mention of prerequisites or when not to use it.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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