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

Annotations already declare readOnlyHint=true and idempotentHint=true, so the safety profile is covered. The description adds meaningful behavioral context by stating it returns endpoints and state transitions rather than performing actions, which clarifies its output-oriented nature.

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 dense sentence front-loaded with 'Explain how to', followed by a precise workflow enumeration. Every phrase adds information and there is no filler or repetition of the input schema.

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 parameterless, read-only explainer tool, the description covers all major workflow stages the agent might need to route: create job, interpret 402, submit proof, poll, retrieve receipt, and verify. The schema description reinforces what the tool returns, so an agent can confidently select and invoke it.

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 takes zero parameters and the schema description coverage is trivially 100%, so there is no parameter documentation burden. The baseline of 4 applies because no further parameter explanation is needed or possible.

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 specific verb ('Explain') and a concrete scope: the full job lifecycle from creation through payment, proof, polling, receipt, and verification. It distinguishes itself from action-oriented siblings like create_paid_job and submit_payment by clearly being a guide rather than an executor.

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 guide-like phrasing implies it should be used when the agent needs to explain or walk through the workflow, but there is no explicit when-to-use or when-not-to-use guidance. It does not name alternatives such as payment_guide or verify_basic, leaving some routing ambiguity.

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