Create env var

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

With no annotations, the description carries the full burden of behavioral disclosure but only states that a variable is created. It does not mention behavior on duplicate keys, whether the operation is idempotent, permissions required, or effects on existing environment variables, which is a significant gap for a mutation 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 a single short sentence, concise and easily parsed. It contains no unnecessary elaboration, earning full marks for brevity and front-loading of the core action.

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 complexity of seven parameters and no output schema or annotations, the description is far too minimal. It fails to explain parameter semantics, required fields beyond 'uuid', or any edge cases, making it inadequate for safe invocation.

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% and the description adds no meaning to any of the seven parameters. The booleans (is_literal, is_preview, etc.) and the significance of the required 'uuid' field are entirely unexplained, so the agent gets no value beyond raw property names.

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 states the verb 'Create' and the resource 'environment variable' for an application, which is clear and specific. It distinguishes itself from siblings like updateEnv and deleteEnv, but does not explicitly differentiate from upsertEnv or createEnvironment, so it lacks strong sibling differentiation.

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 guidance is provided on when to use this tool versus alternatives such as upsertEnv or updateEnv. The description gives no context about prerequisites, when to prefer create over upsert, or scenarios in which this tool is appropriate, leaving the agent without direction.

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