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list_environments

Get a complete list of environments for a Railway project. Provide the project ID to see all associated environments.

Instructions

List all environments in a project

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
projectIdYesThe project ID
Behavior3/5

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

With no annotations, the description must convey behavior. 'List' implies a read-only operation, but it does not disclose details such as pagination, access filters, or whether the returned environments are limited to the current user's permissions. The description is minimally transparent but does not add context beyond the verb itself.

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, focused sentence with no redundancy. Every word earns its place, and the structure is clear and easy to parse.

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 one-parameter list tool, the description is adequate to convey purpose and scope. However, with no output schema, the description does not hint at the return format (e.g., an array of environment objects), leaving a minor gap in completeness.

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?

The schema already covers 100% of the parameters with descriptions. The tool description adds no extra meaning beyond what the schema provides; 'project' in the description simply mirrors the projectId parameter without additional semantic detail.

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 action ('List') and the resource ('environments') with a scope ('in a project'), making it distinct from sibling tools like create_environment or delete_environment. The verb and resource are specific and unambiguous.

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?

The description provides no guidance on when to use this tool versus alternatives. It does not mention prerequisites, such as needing a projectId, or exclusions like when to use get_project or list_services. There is no indication of typical use cases or scenarios where this tool is preferred.

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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