setup_lithic

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

No annotations are present, so the description must disclose behavioral traits. It reveals that the tool reads the LITHIC_API_KEY from the environment, which is a key dependency. However, it does not mention what happens if the key is missing, whether any validation occurs, or what the tool returns or modifies, leaving gaps in transparency.

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 extremely concise with two front-loaded sentences. Every word adds value—defining the tool, its purpose, and a key dependency—with no extraneous information.

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 tool's simplicity (no parameters, no output schema), the description provides essential context: its purpose and a necessary environment variable. It could be improved by briefly noting success/error behavior or prerequisites, but is largely complete for an initialization tool.

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?

The input schema has zero parameters with 100% coverage, so the description naturally cannot add parameter details. It adds value by noting the dependency on an environment variable, which is not a parameter but relevant context.

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 sets up the Lithic virtual card API for AI shopping and reads an environment variable. It uses a specific verb ('Set up') and resource ('Lithic virtual card API'), and distinguishes itself from sibling tools that handle browsing, payments, or other setup operations.

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 implies usage when initializing the Lithic API for shopping, but does not explicitly state when to use this tool versus alternatives like setup_payment or setup_paypal. No usage exclusions or conditions are provided.

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