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get_history

Retrieve execution history for a ComfyUI prompt, including status, timing, and error details. Use after a failed workflow to diagnose issues.

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?

Without annotations, the description carries the burden. It discloses return values (status, timing, cached nodes, output, error info including tracebacks). This is sufficient for a read operation; no hidden behaviors are omitted.

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: first states purpose and returns, second gives usage guidance. No redundancy, every sentence earns its place. Front-loaded with key information.

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 a single optional parameter, no output schema, and no annotations, the description is complete enough. It explains what the tool does, what it returns, and when to use it. Could add more about response structure but sufficient for the complexity.

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 coverage is 100% with a clear description for the only parameter (prompt_id). The description adds usage context but does not enhance parameter semantics beyond the schema. Baseline 3 applies.

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 tool gets execution history for a ComfyUI prompt, listing specific return elements (status, timing, cached nodes, output details, error info). This is a specific verb+resource with sufficient detail to distinguish from sibling tools like get_job_status or get_logs.

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 'Use after a failed enqueue_workflow to diagnose what went wrong,' providing clear context for when to invoke. Does not list alternatives or when not to use, but the guidance is direct 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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