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mastrangi

n8n MCP Server

by mastrangi

Activate Workflow

activate_workflow

Activate a workflow in n8n by its ID to enable its execution.

Instructions

Activate a workflow by ID.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
workflow_idYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Install Server

TDQS

C2.9/5.0
Behavior2/5

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

There are no annotations, so the description must carry the burden of behavioral disclosure. It omits important details about whether activation is idempotent, what happens if the workflow is already active, whether permissions are required, or what side effects occur. It only states the basic operation.

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 a single efficient sentence that front-loads the action and resource. There is no redundancy or filler.

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, so a short description is acceptable. However, the absence of any behavioral context or usage guidance leaves meaningful gaps about activation semantics, making it only minimally viable.

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

Parameters2/5

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

With 0% schema description coverage, the description must compensate, but it only says 'by ID,' which essentially restates the workflow_id property name. It does not clarify ID format, how to obtain a valid ID, or any constraints beyond the schema's string type.

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

Purpose4/5

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

The description uses a specific verb ('Activate') and resource ('a workflow') and indicates the key parameter ('by ID'). It is clearly distinguishable from siblings like deactivate_workflow and execute_workflow, though it does not explicitly contrast with them.

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 provided about when to use this tool versus alternatives such as execute_workflow or update_workflow. The intended context is only implied by the name and verb, with no exclusions or preconditions stated.

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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