github_actions_create_environment_variable

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

No annotations are present, so the description must fully convey behavioral traits. It only states 'Create', which implies mutation, but omits details like whether it overwrites existing variables, required permissions, or side effects. The body parameter is also unexplained.

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 very brief (one sentence) and front-loaded, but it omits necessary context. While concise, it sacrifices completeness, so it is adequate but not optimized.

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 no output schema and no annotations, the description should provide more context about scope, body structure, and behavior. It fails to explain that this creates a variable in a specific environment (implied by parameters) or what shape the body should take. The tool is incomplete for effective use.

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 100% but the descriptions are uninformative (e.g., just the parameter name). The tool description adds no additional meaning. The 'body' parameter is vague ('Request body (JSON object)') without clarifying expected fields (e.g., name, value).

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 'Create an environment variable' clearly states the action and resource type, but it does not differentiate this tool from sibling tools like 'github_actions_create_org_variable' or 'github_actions_create_repo_variable'. The parameters clarify it's for a specific environment, but the description lacks that detail.

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 no guidance on when to use this tool vs alternatives (e.g., org or repo level variables), nor does it mention prerequisites or when not to use it. The agent receives no context for decision-making.

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