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

With no annotations, the description carries the burden. It discloses the output content (purpose, documents, pricing, customer fit), names the specific tiers, and states that no arguments are required, making the tool's behavior predictable. It doesn't mention side effects or response format, but 'list' implies a read-only operation.

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 front-loaded with the main statement, followed by a focused enumeration and a usage note. Every clause adds value, with no filler, though it is slightly long for a simple list operation.

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 no-argument list tool without an output schema, the description covers the returned information, the exact tier names, and the intended use case. An agent has enough context to select and invoke the tool correctly and interpret its result.

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 tool has zero parameters, so the description adds the only relevant guidance: 'No arguments required'. This reinforces the empty schema and clarifies invocation, meeting the baseline for a zero-parameter tool.

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 a specific verb ('list') and resource ('SickSlip service tiers'), and enumerates the tiers and the content fields. It does not explicitly differentiate from sibling get_sickslip_pricing, though the usage note narrows its role to recommending the right product.

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?

It provides an explicit usage scenario: recommend the right SickSlip product for a user's specific situation. It does not mention alternative tools or exclusion cases, so it gives clear context without explicit differentiation.

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