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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the description's 'List' verb aligns with that. The description adds little beyond the annotation, only the filter mention, which is more about parameters. No additional behavioral traits (pagination, return format, auth requirements) are disclosed, but since the safety profile is covered by annotations, a 3 is appropriate.

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, concise sentence that front-loads the action and resource, then mentions the optional filter. It is efficient with no wasted words, earning a perfect score for conciseness and structure.

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 simple list tool with no output schema, the description is minimal but arguably sufficient to invoke it. However, it does not mention what the response contains (e.g., full NFT metadata vs. IDs), and it lacks any hint about pagination or default behavior of the limit parameter. Given the absence of an output schema and the close sibling ambiguity, a bit more context would help, but it is not critically incomplete.

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 description explicitly explains the creatorWallet parameter as a filter, adding meaning beyond the bare schema. The authCode parameter is already thoroughly described in the schema, covering that parameter. However, the limit parameter is not explained in either the description or schema, and schema coverage is only 33% (1 of 3). The description partially compensates but does not fully cover the gap, so a 3 is fair.

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 lists 'OrbitX registered NFTs' with an optional 'creatorWallet filter'. This specifies the verb (List), the resource (NFTs), and a filtering capability, distinguishing it from generic list tools. However, it does not explicitly differentiate from the closely related sibling tools nft_collections and nft_listings, so it loses one point for not preempting confusion.

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 gives no guidance on when to use this tool versus alternatives like orbitx_nft_collections or orbitx_nft_listings. It only mentions an optional filter, implying use when you want NFTs by creator, but no explicit 'use this when...' or exclusions. The agent is left to infer from the name and sibling set.

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