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 useful traits: the Reservoir/Alchemy-free data route, that counts are estimated and floor is only 'where available', and a cost of $0.010 USDC. It omits auth requirements, rate limits, and failure behavior for unsupported chains or invalid addresses.

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?

Compact and front-loaded, but the opening repeats itself ('NFT holdings (multichain) — NFT holdings for a wallet') and the pricing clause is tacked on with no structural signal. Every clause carries information, yet the sentence is an awkward run-on.

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?

There is no output schema or annotations, so the description must stand alone; it covers scope, chains, returned fields, and cost, which is enough to invoke the tool. It does not describe response shape, pagination, or edge cases (e.g. wallets with no NFTs).

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 0% for the single required 'address' parameter. The description implies it is a wallet address and constrains the valid chains to Base and Polygon, but gives no address format or validation details, so it only partially compensates for the undocumented schema.

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 resource and scope: NFT holdings for a wallet, limited to Base and Polygon, with the data returned (collections owned, estimated counts, floor). An agent can tell this apart from balance/token tools, though no sibling is named 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 when-to-use or when-not-to-use guidance, no mention of how this differs from wallet_balances_multichain or portfolio_multichain, and no prerequisites. The chain restriction is stated but framed as a data-source note rather than a selection rule.

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