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extract_video_text

Extract and transcribe on-screen text, captions, speech, and slide content from any public video URL.

Instructions

Extract and transcribe visible text or speech from a video (on-screen text, captions, speech, slide text).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
video_urlYesPublic URL of the video
Behavior3/5

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

No annotations are provided, so the description must carry full burden. It correctly identifies the tool as non-destructive (reading/transcribing), but lacks details on constraints (e.g., supported video formats, length limits, processing time), which would be useful for an agent.

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?

The description is a single, focused sentence with 14 words. It is front-loaded with the core action and lists specific sub-tasks. No redundant words.

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 simple tool with one parameter and no output schema, the description adequately covers what the tool does. It does not specify the return format (e.g., plain text vs. timestamps), but given the context, it is sufficiently complete.

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% (the single parameter video_url is described with format and description). The description adds no additional semantic information beyond the schema, meeting baseline expectations.

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 (extract/transcribe) and resource (video), with specific examples (on-screen text, captions, speech, slide text). It distinguishes from siblings like summarize_video and video_qa.

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 description implies the tool is for text extraction from videos, but it does not explicitly state when to use it over alternatives (e.g., analyze_video for general analysis) or when not to use it.

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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