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comfyui_job_status

Read-only

Check a ComfyUI job's status by prompt ID, showing pending queue position, running, success, error, interrupted, or not found, with output files for finished jobs.

Instructions

Status of a job: pending (with queue_position), running, success, error, interrupted, or not_found. Finished jobs include their output files.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
prompt_idYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

A3.8/5.0
Behavior4/5

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

The readOnlyHint annotation already establishes that this is non-mutating. The description adds useful behavioral details beyond that: pending jobs include a queue_position, and finished jobs expose their output files. This clarifies response semantics without contradicting the annotations.

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?

Two concise sentences with no filler. The status list is front-loaded, and the output-file note is a single, relevant trailing sentence.

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?

For a single-parameter, read-only tool with an output schema, the description covers the important semantic ground: possible statuses, queue_position for pending jobs, and output files for finished jobs. It could add explicit routing guidance against siblings like comfyui_history or comfyui_get_output, but that is more of a usage-guideline gap.

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?

There is only one required parameter, prompt_id, and its purpose as the job identifier is inferable from the parameter name and the tool's job-status scope. However, schema description coverage is 0% and the description never explicitly maps prompt_id to the job being queried, so it adds minimal parameter-level meaning.

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 exactly what the tool reports: the status of a job, and enumerates the possible status values including the queue_position nuance for pending jobs. It is clearly a read/status tool and distinguishable by the 'job' scope from the likely server-level comfyui_status sibling, though it does not explicitly name or compare siblings.

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 intended use is implied: check the status of a previously submitted job, likely after comfyui_run. No explicit when-to-use or when-not-to-use guidance is given, and no alternatives such as comfyui_history or comfyui_get_output are mentioned.

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