Set the referrer for this session

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 main behavioral effect (35% commission credited) and the house link behavior. However, it does not explicitly state whether the setting persists across calls or any error handling for invalid referrers, but the core behavior is well covered.

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 three concise sentences with no fluff. It front-loads the action, provides an example, and includes usage guidance. Every sentence contributes value, making it appropriately sized for the tool's simplicity.

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 single-parameter, no-annotation, no-output-schema tool, the description covers purpose, usage, and behavioral effect sufficiently. It explains the meaning of house link and the commission impact, making it complete for an AI agent to invoke correctly.

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 schema already describes the referrer parameter at 100% coverage. The description adds useful context: the commission rate, the example format, and the condition for setting it. This enhances understanding beyond the schema's raw type description.

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's purpose: to set a referral link/short-name/wallet for crediting referrer commission on subsequent purchases. It uses a specific verb ('Set') and resource ('referrer'), distinguishes from sibling tools like hoton_use_wallet, and provides an example. The scope ('this session') is in the title.

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 explicitly states when to use the tool: 'Only set this if the user named a referrer.' It also explains the house link as an alternative that means no commission, effectively covering when-not-to-set or an alternative value. This is clear usage guidance.

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