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daedalus

mcp-redis-server

redis_lrange

Retrieve a range of elements from a Redis list by specifying start and stop indices.

Instructions

Get a range of elements from a list.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
keyYesThe list key.
startNoStart index.
stopNoStop index (-1 for all).

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

No annotations are present, and the description does not disclose behavioral traits such as read-only nature, error conditions, or performance implications. It adds no value beyond the tool name.

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?

Single sentence, no superfluous words, and the purpose is immediately clear. Conciseness is optimal.

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?

For a simple list range operation with full schema and output schema, the description is minimally adequate. However, it lacks context like usage guidelines and behavioral details, leaving some gaps.

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% with clear parameter names and descriptions. The description does not add extra meaning beyond the schema, meeting the baseline.

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 'Get a range of elements from a list' uses a specific verb ('Get') and clearly identifies the resource and action. It distinguishes from sibling list tools like redis_llen or redis_lpush.

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?

No explicit when-to-use or alternatives are provided. However, the name and description imply it is for retrieving a slice of list elements, which is self-explanatory among siblings.

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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