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run_workflow

Execute a Langflow workflow with custom inputs, optional streaming, and background execution.

Instructions

Run a workflow (V2) for a flow with inputs. Supports streaming and background execution.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
inputsNoWorkflow inputs
streamNoStream the run
flow_idYesFlow ID
globalsNoRequest-level global variables (Langflow 1.10.0)
backgroundNoRun in background
Behavior3/5

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

With no annotations provided, the description carries the burden. It discloses support for streaming and background modes but does not explain behavioral aspects like whether it is read-only or mutating, or what happens after background execution.

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 concise sentence, front-loading the main action and adding key features (streaming, background) without unnecessary words.

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 the complexity (5 parameters, nested objects) and absence of an output schema, the description provides no information about return values, result structure, or how to handle background runs, leaving important gaps.

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 description coverage is 100%, so the schema already describes all parameters. The description adds no additional parameter context beyond the schema, meeting the baseline for high coverage.

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 clearly states it runs a workflow (V2) with inputs and mentions support for streaming and background execution. However, it does not differentiate from sibling tools like run_flow or run_flow_advanced, which have similar purposes.

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 workflows requiring streaming or background execution but provides no explicit when-to-use or when-not-to-use guidance, nor does it mention alternatives among the many sibling tools.

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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