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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is fully covered by structured data. The description adds nothing beyond that — no pagination behavior, no result ordering, no auth or team-scoping requirements.

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 with no filler; the resource and scope come first. It is arguably too terse given the undocumented parameter set, but as written every word earns its place.

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 9-parameter read tool with no output schema and 0% schema description coverage, the description leaves the agent without return-format, filtering, or pagination context. Annotations carry the safety profile but cannot cover the parameter and result gaps.

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 9 parameters, so the description must compensate and largely does not. It hints that a deployment identifier is the anchor ('for an existing deployment') but never explains deployment_id vs team_id, or what the beon_* plumbing parameters and the two enum fields are for.

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 + resource ('List aliases') and narrows scope to 'an existing deployment', so an agent can distinguish it from vercel_set_alias and vercel_delete_alias. It stops short of explicitly naming those siblings or the contrast between listing and mutating aliases.

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?

No when-to-use guidance, no prerequisites, and no reference to alternatives such as vercel_list_deployments or vercel_list_project_domains. The only implied constraint is that a deployment must already exist.

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