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

With no annotations, the description carries the behavioral burden. It usefully discloses the paid nature ($0.01 USDC via x402) and scopes the answer to 'documented' CC0 status, but it does not describe failure behavior, supported networks, or whether the response includes absent/unknown status cases.

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 tightly-written block: purpose, result, and cost are all present with no filler. The paid warning is front-loaded through the bracketed note, and every sentence contributes.

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 single-parameter read oracle, the description covers what it does, what it returns, and the key operational constraint (payment). It omits edge-case behavior and chain assumptions, but the schema fills the invocation requirement and the tool is simple enough that this is nearly complete.

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 only parameter, contract, is already fully documented in the schema with its type and meaning. The description adds no additional parameter-level detail, so the baseline of 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?

The description names a specific operation: checking whether an EVM contract is a documented CC0 work, and specifies the return (license + provenance). It is clear, but it does not explicitly differentiate from sibling tools like cc0pedia-search or cc0pedia, so the distinction is left mostly to the tool name.

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 question "is a contract a documented CC0 work?" implies this tool is for verifying one specific contract against CC0 documentation. However, there is no explicit when-to-use guidance or comparison to alternatives such as cc0pedia-search, so an agent must infer the routing.

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