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Redis MCP Server

Redis MCP Server

by Yuchenhui
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Remote

lpop

Remove and retrieve the first element from a Redis list. Useful for dequeuing or processing items in FIFO order.

Instructions

Remove and return the first element from a Redis list.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "name": "<name>"
    },
    "name": "lpop"
  }
}

Input Schema

NameRequiredDescriptionDefault
nameYes

Output Schema

NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.3.5

TDQS

B3.3/5.0
Behavior2/5

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

No annotations provided, so description must disclose behaviors. It states removal and return but omits crucial details like behavior on empty list, atomicity guarantee, or type restrictions.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Single concise sentence (9 words) is efficient, but could add a short second sentence for common edge case (empty list) without harming conciseness.

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?

With simple tool and output schema assumed to exist, description covers the basic purpose but lacks completeness on edge cases and error handling typical for a pop operation.

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

Parameters2/5

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

Schema description coverage is 0%, yet the description provides no clarification for the single parameter 'name' (e.g., that it is the key of the list), leaving ambiguity.

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 the action ('Remove and return') and the resource ('first element from a Redis list'), distinguishing it from siblings like rpop (remove last) and lrange (get without removal).

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?

Description implies usage for removing from left of a list but provides no explicit context on when to choose this over alternatives (e.g., rpop, lpop vs lrange) or conditions like empty lists.

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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