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lean_get_widgets

Read-onlyIdempotent

Retrieve panel widgets like proof visualizations and custom widgets at a specific cursor position in a Lean file. Useful for extracting detailed widget data for analysis.

Instructions

Get panel widgets at a position (proof visualizations, #html, custom widgets). Returns raw widget data - may be large.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
lineYesLine number (1-indexed)
columnYesColumn number (1-indexed)
file_pathYesAbsolute path to Lean file

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
widgetsNoWidget instances (id, name, range, props)
Behavior4/5

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

Annotations already declare readOnlyHint and idempotentHint, making the tool's safety profile clear. The description adds extra value by warning that 'data may be large', which is important behavioral context beyond 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 sentences, front-loaded with the main purpose, and a second sentence providing a critical warning. No unnecessary words or redundancy.

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 the presence of an output schema (handling return format), 100% parameter coverage, and the description providing examples and a size warning, the description is complete for a simple retrieval tool.

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 description coverage is 100%, so the schema itself documents all three parameters. The description adds no additional meaning to the parameters, thus baseline 3 is appropriate.

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 retrieves panel widgets at a position, listing examples (proof visualizations, #html, custom widgets). It distinguishes from sibling lean_get_widget_source by noting it returns raw widget data.

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?

The description implies when to use (need panel widgets at a position) but does not explicitly mention when not to use or list alternatives. With many sibling tools, explicit exclusions would be helpful, but the context is still clear.

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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