x402 crypto market structure

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

No annotations are provided, so the description carries the full burden. It mentions 'Live crypto market snapshot' which suggests real-time data, but does not disclose behavioral traits such as rate limits, data freshness, authentication needs, or error handling. The description is minimal and lacks critical operational details.

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 appropriately sized and front-loaded, starting with the core purpose and followed by supported tokens. It uses a single sentence efficiently, though it could be slightly more structured for readability.

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?

Given the lack of annotations and output schema, the description is incomplete. It does not explain what the return values look like (e.g., format of the snapshot data), error conditions, or other contextual details needed for effective tool use. The description relies too heavily on implied understanding.

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 the 'token' parameter. The description adds value by listing specific token examples (BTC, ETH, SOL, etc.), which helps clarify valid inputs beyond the schema's generic description. However, it does not provide additional syntax or format details.

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 states the tool's purpose with specific verbs ('Live crypto market snapshot') and resources (price, funding rate, open interest, etc.), and distinguishes it from siblings by listing the specific tokens it supports. It provides a comprehensive overview of what data the tool retrieves.

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 usage by listing the supported tokens, but does not explicitly state when to use this tool versus alternatives like marketAnalyze or marketFull. It provides some context but lacks explicit guidance on tool selection or exclusions.

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