Railway MCP Server

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It clearly indicates this is a read-only operation ('Get detailed information'), which is appropriate for an info-retrieval tool. However, it doesn't mention potential limitations like rate limits, authentication requirements, or error conditions, leaving some behavioral aspects unspecified.

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?

The description is well-structured and front-loaded with the core purpose, followed by organized sections (Best for, Prerequisites, Next steps, Related). Every sentence earns its place by providing specific guidance without redundancy. The use of symbols (⚡️, ✓, →) enhances readability without adding fluff.

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?

Given the tool's moderate complexity (single parameter, read-only operation) and 100% schema coverage, the description is mostly complete. It provides excellent usage guidance and purpose clarity. However, without annotations or an output schema, it could benefit from mentioning what kind of detailed information is returned (e.g., project metadata, environment details, service configurations) to fully compensate for the lack of structured output documentation.

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 100% (the single parameter 'projectId' is fully described in the schema), so the baseline is 3. The description doesn't add any additional parameter information beyond what's already in the schema, but it doesn't need to since the schema coverage is complete.

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?

The description clearly states the tool's purpose with a specific verb ('Get detailed information') and resource ('about a specific Railway project'). It distinguishes from siblings like project_list (which lists projects) and project_update/project_delete (which modify projects) by focusing on retrieving details for a single project.

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 provides explicit guidance on when to use this tool ('Best for: Viewing project details and status, Checking environments and services, Project configuration review'), prerequisites ('Prerequisites: project_list'), next steps ('Next steps: service_list, variable_list'), and related alternatives ('Related: project_update, project_delete'). This covers both when-to-use and when-not-to-use scenarios effectively.

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