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

With no annotations, the description carries the burden and does well: it discloses the $0.50 USDC price, chain and wallet, the accepted payment payloads (payment_tx, x_payment, quote_id), and latency <300ms. Auth/permission nuances beyond payment and failure behavior are not addressed, keeping it below 5.

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?

Purpose and capability list are front-loaded, with payment mechanics after. It is dense but coherent; the only minor waste is repeating wallet/price details that the schema also carries.

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?

No output schema exists, so the description must convey return content — it lists the concrete data elements and both formats (JSON + TXT). Pricing and case_path example are covered. It falls short only on edge cases like invalid case_path or failed payment.

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?

Schema description coverage is 100%, so the schema already documents all four parameters including the payment variants. The description's payment paragraph restates what the schema says (payment_tx, quote_id semantics) rather than adding new parameter meaning, so baseline 3 applies.

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?

States a specific verb+resource ('cross-exercise biomechanical summary') and enumerates its contents: asymmetry indices, ROM, fatigue markers, clinical synthesis. However, it never distinguishes itself from the close sibling get_rehab_report, leaving the agent to guess which summary/report to pick.

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 names two usage contexts ('insurance_claim_validation' or 'rehab_progress_tracking'), which implies when to reach for it. But it gives no exclusions and does not explain how it differs from get_rehab_report or get_rehab_profile, so the routing decision is only partly supported.

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