Add environment variables

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

The annotations already indicate non-readonly, non-idempotent mutation. The description adds 'replace' implying overwriting behavior, but does not disclose details like whether the environment must be stopped, or the exact side effects of replacing vs appending.

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 concise sentence with no extraneous words or repetition. It is front-loaded with 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 simple 3-parameter schema and no output schema, the description provides minimal context. It omits information such as whether replacing variables is irreversible, or any constraints like maximum variable count. The lack of output schema is not an issue here.

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 100%, so the parameters are fully described in the schema. The description adds no extra meaning beyond the schema's fields, but it implicitly hints at the method parameter by mentioning 'add or replace'. Thus baseline score of 3.

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 the tool adds or replaces environment variables on an environment, using a specific verb+resource structure that distinguishes it from sibling tools like delete_environment_variables or list_environments.

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 (e.g., delete_environment_variables for removal, update_environment for non-variable changes). The description does not mention prerequisites or when not to use it.

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