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LocalStack MCP Server

LocalStack MCP Server

by giovanemartins
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Local

kinesis_list_streams

List all Kinesis streams in your LocalStack environment to monitor active data streams during local AWS development and testing.

Instructions

List all Kinesis streams in LocalStack

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

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

Input Schema

NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

A4/5.0
Behavior3/5

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

With no annotations, the description carries the burden. It states the core action (listing) and scope (all streams in LocalStack), which implies a read-only operation, but does not disclose additional traits like pagination, return format, or permissions.

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 sentence that is front-loaded with the action and resource, containing no extraneous 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, parameterless list operation, the description adequately conveys the purpose. It could mention the return format (e.g., stream names) but the lack of an output schema makes this a minor gap.

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?

The input schema has zero parameters, so the baseline is 4. The description correctly adds no parameter information, as none exists, and the schema fully defines the empty parameter set.

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 lists all Kinesis streams in LocalStack, using a specific verb and resource. It distinguishes from sibling tools like kinesis_describe_stream and kinesis_create_stream by specifying the list action.

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 used to enumerate Kinesis streams but does not explicitly provide usage context or mention alternatives. For a simple listing tool, the usage is clear from the description, so it rates as implied.

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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