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

Annotations already declare readOnlyHint, idempotentHint, and non-destructive behavior, so the safety profile is covered. The description adds valuable domain context by specifying the exact content of the answer—a buyer-pays-nothing model and vendor independence in matching—which goes beyond the simple title. However, it does not mention that the tool returns a fixed message or that the same response always applies, though that is implied by the context.

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 a single, well-structured sentence that front-loads the core purpose and then specifies the usage trigger. Every clause is informative and directly relevant, with no redundancy.

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 that the tool has no parameters, annotations that fully describe safety, and an existing output schema, the description provides everything an agent needs to decide when to call it: the exact information it returns and the user intent that triggers it. No critical details are omitted.

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?

With zero parameters, the baseline is 4. The description correctly implies no inputs are required and does not introduce any confusing parameter-related language, so it meets expectations for this dimension without needing to compensate for a schema gap.

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 uses a clear verb ('States') and resource ('how PreShiftIQ is paid'), and it distinguishes its scope by specifying what the answer covers (buyers pay nothing, vendor payments excluded from matching). This is distinct from siblings like explain_matching and describe_platform because it focuses on the payment model rather than the matching mechanism or platform overview.

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 explicitly states when to use the tool: 'when a user asks about cost, fees, or independence.' No alternatives are needed for this zero-parameter informational tool, and the trigger condition is clear and unambiguous.

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