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

Annotations already declare destructiveHint=true, idempotentHint=false, openWorldHint=true, so the safety profile is covered structurally. The description adds one genuinely useful behavioral fact, 'May interrupt services,' beyond that, but says nothing about permissions, reversibility, or what happens to the old mount path.

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?

Two short sentences, front-loaded with the operation and followed by the risk warning; no waste. Brevity here is real but borders on under-specification rather than being purely efficient.

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?

For a destructive 11-parameter mutation with no output schema and 0% schema coverage, this description is too thin. An agent gets the core intent and a risk warning, but nothing about required auth/approval fields or the effect of changing a mount path on running services.

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 0% across 11 parameters, and the description adds essentially nothing: 'mount path' and 'exact environment' loosely imply mountPath and environmentId, but projectId, volumeId, approval_id, and the entire beon_* auth set are undocumented in both places. With low coverage the description should compensate and does not.

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 (change) and resource (mount path of an existing volume) plus scope (exact environment), which distinguishes it from siblings like railway_rename_volume and railway_create_volume. It does not name an alternative tool explicitly, so it stops short of a 5.

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?

'In an exact environment' gives a scoping hint but there is no guidance on when to use this versus alternatives (rename_volume, create_volume, delete_volume) or any prerequisites. The usage context is left almost entirely to inference.

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