buy_egg

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

No annotations provided, so description must carry behavioral disclosure. It mentions cost but does not describe what happens after purchase (e.g., where the egg goes, error conditions), nor authorization requirements or balance checks.

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?

Extremely concise (two sentences), front-loaded with key action and cost details, 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?

Adequate for a simple one-parameter tool without output schema, but lacks information about return value, success/failure behavior, and prerequisites like USDC balance.

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?

Adds concrete pricing information ($0.10 for random, $6 for giant) that is not present in the input schema, which only describes the enum values.

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?

Clearly states the action is to buy an egg, specifies it costs USDC, and distinguishes between two types with prices. However, it does not explicitly differentiate from sibling tools like 'hatch_egg'.

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?

Implies usage for purchasing eggs, but no explicit guidance on when to use versus alternatives like 'hatch_egg' or when not to use (e.g., if lacking funds).

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