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kskwon02

node-red-mcp

by kskwon02

Update Node

node-red-flows-update-node

Update a node's properties in a Node-RED flow tab by deep-merging provided attributes onto the existing node configuration.

Instructions

Update specific properties of a single node in a flow tab. Deep-merges the provided properties onto the existing node.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
flowIdYesID of the target flow tab
nodeIdYesID of the node to update
propertiesYesPartial node properties to merge onto the existing node
expectedRevNoOptional revision guard for conflict detection
Behavior3/5

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

With no annotations, the description carries the full burden. It discloses the deep-merge behavior, which is helpful, but does not mention conflict detection via expectedRev or any side effects (e.g., redeployment triggers).

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 two sentences, directly stating the action and merge behavior without any fluff. Every word adds value.

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?

No output schema or annotations exist. The description explains the merge behavior but lacks information about return values, error handling, permission requirements, or what happens if the node does not exist. It is adequate but not thorough.

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 100%, so baseline is 3. The description adds that properties are deep-merged, providing some extra meaning beyond the schema, but does not explain expectedRev or the properties object format beyond what the schema says.

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 clearly states it updates specific properties of a single node and uses deep-merges, distinguishing it from sibling tools like add-node, remove-node, and rewire-node.

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

Usage Guidelines3/5

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

The description implies usage for modifying node properties but does not explicitly guide when to use this tool versus alternatives (e.g., rewiring or moving nodes). No when-not or exclusion criteria are provided.

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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