vercel_create_env

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

No annotations are provided, so the description carries full burden. It mentions 'upsert' behavior and target defaults, but does not disclose authentication requirements, rate limits, or side effects beyond the upsert.

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 concise sentences with no filler. The first sentence delivers the core purpose, and the second adds essential usage detail. Every sentence 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?

Despite 10 parameters, no annotations, and no output schema, the description covers the main action and two key parameters but omits guidance on authentication (api_key), team_id, git_branch, comment, or return value. Feels adequate but not comprehensive.

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 coverage is low (30%). The description adds value by clarifying when to use 'plain' vs 'encrypted'/'sensitive' and stating default targets, partially compensating for the lack of schema descriptions. Other parameters remain undocumented in both schema and description.

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 'Create (or upsert) an environment variable on a Vercel project', using a specific verb and resource. It distinguishes from sibling tools like vercel_delete_env and vercel_get_env by focusing on creation/upsert.

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 useful guidance on default targets and type semantics (plain vs encrypted/sensitive). However, it does not explicitly contrast with alternatives (e.g., vercel_get_env for reading, vercel_delete_env for deletion).

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