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ylt

nodered-mcp

by ylt

create_flow

Create a new Node-RED flow by passing its configuration as a JSON string, and receive the unique ID for the newly created flow.

Instructions

Create a new flow.

Args: flow_json: Flow configuration as JSON string

Returns: FlowCreateResult with the new flow ID.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
flow_jsonYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
idNo
Behavior2/5

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

With no annotations, the description carries full responsibility. It only mentions creating a flow and returning a result with a new flow ID, but omits side effects, error conditions, idempotency, or permissions.

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

Conciseness5/5

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

The description is concise, using a clear 'Args' and 'Returns' structure with no redundant information. Every line serves a purpose.

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

Completeness3/5

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

The tool is simple with one parameter and an output schema, and the description provides the essential information. However, it could be more complete by clarifying the flow_json format and any behavioral expectations.

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 coverage is 0% and the description adds a basic meaning for flow_json as 'Flow configuration as JSON string', which is helpful but lacks detail about the expected structure.

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?

The description explicitly states 'Create a new flow' with the resource and action clearly identified, distinguishing it from siblings like update_flow and delete_flow.

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 is given on when to use this tool versus alternatives, nor any exclusions or prerequisites. The usage is only implied by the tool's name and simple description.

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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