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get_history

Retrieve execution history for a ComfyUI prompt to diagnose failures. Returns status, timing, cached nodes, outputs, and full error details including Python tracebacks.

Instructions

Get execution history for a ComfyUI prompt. Returns status, timing, cached nodes, output details, and full error information including Python tracebacks. Use after a failed enqueue_workflow to diagnose what went wrong.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
prompt_idNoSpecific prompt ID to look up (returned by enqueue_workflow). If omitted, returns the most recent execution.
Behavior4/5

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

No annotations provided, so description bears full burden. It discloses return fields (status, timing, cached nodes, output, error info including tracebacks), implying read-only access. No contradictions or hidden behaviors.

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 sentences, no wasted words. First sentence states purpose and returns, second gives usage guidance. Perfectly front-loaded and compact.

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

Completeness5/5

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

Given simple tool with one optional parameter and no output schema, the description fully covers purpose, returns, and when to use. No missing information for correct agent invocation.

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

Parameters4/5

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

Schema coverage is 100% with one optional parameter. Description adds meaning by stating the prompt_id comes from enqueue_workflow and that omitting it returns the most recent execution, providing context beyond schema.

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 clearly states the verb 'Get', resource 'execution history for a ComfyUI prompt', and lists specific return fields including error tracebacks. It distinguishes from sibling tools like get_job_status or get_queue by focusing on prompt-level history with diagnostics.

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?

Explicitly says to use after a failed enqueue_workflow to diagnose errors. Although it doesn't mention when not to use or alternatives, the context is clear and actionable.

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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