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

Annotations already declare destructiveHint=true, idempotentHint=false and openWorldHint=true, so the safety profile is covered. The description contributes one useful fact — that this mutates production traffic delivery — but says nothing about overwriting/conflicting routes, precedence, or rollback, which matters for a routing mutation.

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, no padding, and the core action is front-loaded. The second sentence is terse but slightly vague in a way that could have been spent on parameter or impact detail.

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, non-idempotent mutation with 13 undocumented parameters and no output schema, two sentences are far too thin. An agent is missing the information needed to call it correctly or safely.

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 13 parameters, and the description adds no parameter meaning whatsoever. Non-obvious semantics such as whether src/dest are globs, regexes or literal paths, and what the status enum controls, are left entirely to guesswork.

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 and resource ("Create a project route") and adds a scope note that the change affects production delivery. It is distinguishable from siblings like vercel_list_project_routes and vercel_delete_project_routes, though it never names an alternative explicitly.

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?

There is no statement of when to create a route versus configuring domains or using other Verce routing tools, and no prerequisites or ordering constraints. "Changes production delivery behavior" implies consequence but gives no condition an agent could act on.

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