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Get Line Range

get_lines

Retrieve lines from a Neovim buffer by specifying a zero-indexed start line and an exclusive end line.

Instructions

Returns lines from start to end (0-indexed, end-exclusive).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
endYes
startYes
Behavior2/5

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

No annotations provided. Description is minimal, stating only the read-like behavior. It does not disclose error handling, performance, or what happens for invalid indices.

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?

A single, direct sentence that conveys the core functionality. Zero wasted words, front-loaded with purpose.

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

Completeness3/5

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

Simple tool with no output schema. The description explains what it does but omits return format and error conditions. Given the sibling tools, some usage guidance would improve completeness.

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 has 0% description coverage, but the description adds crucial details: parameters are 0-indexed and end-exclusive. This adds significant meaning beyond the schema's type constraints.

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 it returns lines from start to end with 0-indexed, end-exclusive semantics. It distinguishes from siblings (get_full_file, get_path, etc.) by focusing on a specific range.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this tool vs alternatives like get_full_file. The description does not mention context or exclusions.

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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