enter_giveaway

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

With no annotations, the description carries the full burden. It discloses the auth requirement (paid subscription) and ticket multiplier behavior, which adds useful context. However, it does not describe side effects (e.g., creating an entry, idempotency, or what happens on repeated calls) or the response format, leaving important behavioral aspects unclear.

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 concise and well-structured: it opens with the action, then states the critical eligibility constraint, and finally explains ticket multipliers. Every sentence contributes useful information with no redundancy or filler.

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?

For a simple 2-parameter tool with no output schema, the description covers the core action and constraints, but lacks details about what the caller can expect after entering (e.g., confirmation, ticket count, errors). It also does not clarify optional behavior related to agent_name or whether repeated entries are allowed, leaving some contextual gaps.

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%, and both parameters (api_key and agent_name) have descriptions. The tool description does not add parameter-specific meaning beyond the schema; it only mentions plan-based ticket multipliers, which is related to eligibility rather than parameter semantics. The baseline of 3 applies because the schema fully documents parameters.

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 action ('Enter the active giveaway') with a specific verb and resource. It distinguishes this tool from siblings like get_giveaway by focusing on entering rather than viewing, and adds a scope ('active giveaway') that defines the target.

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 explicit eligibility context ('PAID SUBSCRIBERS ONLY') and explains how ticket counts scale by plan, which helps the agent determine when this tool is appropriate. However, it does not explicitly mention alternative tools (e.g., get_giveaway for viewing) or exclusion scenarios beyond non-paid status.

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