paywall_create_route

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

With no annotations, the description carries the full burden and does well: it discloses that settlement is USDC direct to payTo, that upstreamUrl proxies paid requests to a backend, that changes go live in ~20s, and that PAYWALL_API_KEY is required. It does not describe reversibility or the response, but the operational profile is unusually well surfaced for an unannotated tool.

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?

Three tight sentences, zero filler, front-loaded with the core action followed by settlement/proxy behavior and then the timing/auth constraint. Every sentence carries distinct information.

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 an 8-param create tool with no annotations and no output schema, the description covers purpose, side effects, latency, auth, and settlement flow. The only gap is return-value/confirmation behavior, which is minor since no output schema is declared.

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 coverage is 100%, so baseline is 3, but the description adds meaning beyond the schema by explaining what upstreamUrl actually does (proxies paid requests to your backend) and confirming USDC settlement to payTo. This clarifies the two most consequential params rather than merely restating them.

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 and resource: 'Paywall a new endpoint with x402 pay-per-call.' The 'new endpoint' framing distinguishes it from paywall_update_route/paywall_delete_route/paywall_list_routes, but it never names those siblings explicitly.

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?

There is no explicit when-to-use guidance and no reference to alternatives such as paywall_import_routes or paywall_update_route. The agent must infer the create-vs-update-vs-import choice from the name alone, and nothing states prerequisites or exclusions beyond the API key note.

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