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 effectively conveys that this is a destructive operation (implied by 'Delete' and cleanup context) and adds practical guidance like recommending volume_backup for data backup, though it lacks details on permissions, rate limits, or irreversible effects, which would be beneficial for a deletion tool.

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 bullet-pointed guidelines and related references. Each sentence earns its place by providing clear, actionable information without redundancy, making it highly efficient and easy to scan.

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 complexity as a destructive operation with no annotations or output schema, the description does a good job covering purpose, usage, and prerequisites. However, it could be more complete by explicitly warning about data loss or confirming deletion irreversibility, which are critical for such a tool.

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?

The schema description coverage is 100%, with the parameter 'volumeId' fully documented in the schema as 'ID of the volume to delete'. The description does not add any additional semantic information beyond what the schema provides, so it meets the baseline of 3 for high schema coverage without extra value.

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 specific action ('Delete a volume from a service') with the resource ('volume') and context ('from a service'), distinguishing it from siblings like volume_create, volume_list, and volume_update. It uses a precise verb and identifies the target resource without ambiguity.

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 with 'Best for' and 'Not for' sections, naming specific use cases (e.g., 'Removing unused storage') and exclusions (e.g., 'Temporary data removal'), and references prerequisites ('volume_list') and related tools ('service_update'), clearly indicating when to use this tool versus alternatives.

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