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

With no annotations, the description carries the full behavioral burden. It does state 'FREE' and describes the tool as a 'step-by-step guide,' which signals an informational, non-transactional operation. However, it does not explicitly disclose that the tool performs no state changes, returns documentation text, or requires any authentication, leaving some behavioral ambiguity for an agent.

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, compact sentence that front-loads the key 'FREE' signal and immediately states the tool's purpose. Every element adds value: the step-by-step nature, the payment topic, the x402 v2 version, and the relevant header examples. There is no redundant or filler text.

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 zero-parameter guide tool with no output schema, the description covers the essential context: what the guide teaches, which protocol version, and the exact header formats. It could marginally improve by noting the return format or that the guide is plain documentation, but the current content is sufficiently complete for an agent to understand what this tool offers.

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 baseline for this dimension is 4. There is no schema information to elaborate on, and the description correctly focuses on the guide's content rather than inventing parameter details. Nothing extra is needed.

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 identifies the tool as a step-by-step guide for paying and calling KHOTEM, naming the specific protocol (x402 v2) and relevant headers (PAYMENT-SIGNATURE / X-PAYMENT: txHash). This is a distinct meta-tool compared to sibling operation tools like khotem_seal or khotem_attest, though it uses a noun ('guide') rather than a direct verb. It is specific enough to avoid confusion with the other KHOTEM tools.

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 implies the tool should be used when an agent needs instructions on how to pay and call KHOTEM, but it does not explicitly state when to use it versus the sibling tools. It names the covered topics but offers no direct guidance about prerequisites or the order of operations relative to khotem_seal, khotem_attest, or khotem_status. Usage context is inferable rather than explicit.

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