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

With no annotations, the description carries the full burden, and it does disclose meaningful behavior: the $1 cost converted at the live XNT rate (explicitly not hardcoded), the 1 USDC alternative, accepted chains, and that it returns x402 payment details. It is ambiguous whether the $1 is charged for this call or is the price of the posting action being described, and it says nothing about auth or idempotency.

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 sentences, front-loaded with the purpose, then pricing, then return shape. No filler. The pricing sentence is dense but each clause adds 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 a 7-parameter tool with no annotations and no output schema, the description covers the commercial and return aspects well but leaves the entire input contract unexplained, so an agent cannot tell which of the seven optional fields actually matter for getting usable instructions.

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?

Seven parameters with 0% schema description coverage, and the description explains none of them. It mentions Solana/Arc/Base and a dollar figure, which loosely hints at 'chain' and 'priceUsd', but agentName, description, capabilities, agentAddress and contact are completely undocumented in both schema and description.

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: get instructions for posting an agent card to the Agora. An agent can tell this is a prerequisite/how-to tool rather than the listing itself. It does not explicitly distinguish itself from nearby siblings such as agora_list or arc_passport_draft, so it stops short of a 5.

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?

Usage is only implied: you call this to obtain posting instructions and payment details before publishing an agent card. There is no explicit 'use this instead of X' or statement of prerequisites/ordering relative to the actual post action.

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