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

The annotations already establish readOnly, non-destructive, and closed-world behavior, so the description need not repeat safety details. It adds project scope and optional filters, but does not disclose ordering semantics for 'recent', default page size, the maximum limit, or pagination behavior.

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

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

A single front-loaded sentence that names the operation, resource, scope, and filter options with no redundant wording.

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

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

With seven parameters and an output schema present, the description covers the core listing purpose but omits default/max limit behavior, result ordering, and identifier expectations. Annotations and the output schema reduce the burden, but the definition remains only minimally complete for correct invocation.

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

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

Schema description coverage is only 43%, and the description names project plus environment/service/status filters but leaves limit, since, and context_id unexplained. It also does not clarify identifier formats for project, environment, or service, so it only partially compensates for the sparse schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb ('List') and resource ('recent deployments'), scoped to a project with optional filters. It is clearly a list operation, distinguishing it partly from the singular railway_deployment_get, but it does not explicitly name that sibling or other status-oriented alternatives.

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

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

The description implies usage: list recent deployments for a project, optionally filtered. However, it gives no explicit when-to-use guidance versus railway_deployment_get or railway_project_status, and no prerequisites or exclusions.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.