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download_all_outputs

Downloads all output files for a ComfyUI prompt into a local directory and returns their saved paths, letting you gather execution results in one step.

Instructions

Download all output files for a prompt into a directory. Returns list of saved paths. Requires COMFYUI_HOST.

Input Schema

NameRequiredDescriptionDefault
dest_dirYesLocal directory path to save files
prompt_idYesPrompt id from execute_workflow or execute_workflow_sync
prefix_node_idNoPrefix filename with node_id to avoid collisions (default true)

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

B3.4/5.0
Behavior3/5

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

No annotations are provided, so the description carries the burden. It usefully discloses the COMFYUI_HOST prerequisite and that it returns a list of saved paths, but says nothing about overwrite behavior when files already exist, failure modes, or whether the directory must pre-exist.

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

Conciseness4/5

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

Three short sentences, front-loaded with the action and resource, with zero filler. Slightly terse but every sentence contributes something.

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?

For a 3-parameter download tool with no annotations and no output schema, the description covers the return value and the env prerequisite, but omits practical concerns like directory creation, collision handling beyond the prefix flag, and error conditions.

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 all three parameters including prefix_node_id are documented in the schema. The description adds no semantics beyond what the schema already states, which is the expected baseline.

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?

States a specific verb+resource: downloading all output files for a prompt into a directory, plus the return value. The word 'all' implicitly distinguishes it from the single-file siblings download_output and download_by_filename, though it does not name them explicitly.

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?

Usage is only implied by 'all output files' – an agent can infer this is the bulk variant versus the single-file downloaders, but there is no explicit when/when-not guidance or named alternative.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.