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NestorPVsf

n8n-workflows-mcp

by NestorPVsf

get_workflow_schema

Obtain the input schema and webhook details needed to call an n8n workflow, enabling AI agents to execute workflows via a standard interface.

Instructions

Returns the input schema and webhook details needed to call a given n8n workflow.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
workflowIdYes
Behavior4/5

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

With no annotations provided, the description carries the burden. It discloses that the tool returns schema and webhook details, which is a specific behavioral trait beyond a generic 'get'. It does not mention error cases or side effects, but for a simple getter this is adequate.

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, focused sentence with no fluff. It conveys the core purpose and key return contents efficiently.

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

Completeness4/5

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

Given the tool's simplicity (one parameter, no output schema, no annotations), the description is mostly complete. It explains what the tool returns and implies its role in workflow execution. It could mention error behavior or read-only nature, but the low complexity lowers the bar.

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?

The schema has 0% description coverage, and the only parameter is workflowId. The description mentions 'given n8n workflow', which clarifies that workflowId refers to a workflow identifier but adds no format or usage details. The parameter name is self-explanatory, but the description doesn't fully compensate for the lack of schema description.

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 states a specific verb ('Returns') and a specific resource ('input schema and webhook details needed to call a given n8n workflow'), clearly distinguishing this from sibling tools like execute_workflow or list_workflows. It answers 'what does it do?' precisely.

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

Usage Guidelines4/5

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

The description implies usage context: it is needed before calling a workflow, as it provides the schema and webhook details required for that call. It does not explicitly name alternatives or exclusions, but the context is clear enough for an agent to infer when 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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