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metaflow-mcp-server

by npow

get_run

Retrieve detailed status of a run with per-step breakdown. Use summary mode to get task counts and only failing tasks for large flows.

Instructions

Get detailed status of a run including per-step breakdown.

By default returns every task in every step — for flows with large foreach fan-outs (hundreds/thousands of tasks per step) this payload can be enormous. Pass summary=True to get per-step counts + only the failing tasks, which is usually what you want when diagnosing a failure.

Args: pathspec: Run pathspec like "FlowName/RunID". summary: If True, return per-step task counts (total/successful/failed/running) and list only failing tasks. Recommended for foreach-heavy flows. Default False preserves full per-task detail.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pathspecYes
summaryNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior4/5

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

Describes default behavior (returns every task, potentially huge payload) and the effect of summary=True, disclosing important behavioral traits despite no 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 paragraphs with front-loaded purpose, each sentence adds value with no fluff or repetition.

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 presence of output schema and simple parameters, description covers all necessary context, including edge cases (large payloads) and parameter guidance.

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

Parameters5/5

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

Adds significant meaning beyond the schema: explains pathspec format and summary parameter's purpose, recommended usage, and default value, compensating for 0% schema coverage.

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?

Description clearly states 'Get detailed status of a run including per-step breakdown,' using a specific verb and resource, and distinguishes from siblings like get_recent_runs.

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 recommends using summary=True for foreach-heavy flows to avoid large payloads, guiding the agent for appropriate usage, though lacks explicit when-not-to-use statements.

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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