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

Annotations already establish readOnlyHint=true and openWorldHint=true, so the safety profile is clear. The description adds static domain facts about index funds being ERC-20 tokens backed by baskets, but it does not disclose listing behavior such as pagination, ordering, or whether results are complete or limited.

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 definition is short and free of filler, but the first sentence reads as a domain blurb rather than a front-loaded statement of what the tool does. It is concise but not optimally structured for tool selection.

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?

With three parameters, incomplete schema coverage, no output schema, and no usage guidance, the description leaves significant gaps. It does not explain return shape, pagination, sorting semantics, or filtering behavior beyond the creator parameter noted in the schema.

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 only 33%, and only the creator parameter is documented in the schema. The description does not explain the sort or limit parameters, nor does it add meaning beyond the schema's enum and bounds.

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 identifies the resource domain (Indexfy index funds on Base) and mentions data fields like price, TVL, and performance. However, it never uses a listing verb and does not explicitly distinguish this tool from siblings such as get_index or build_buy_index.

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?

No guidance is given about when to use this tool versus alternatives. It does not say whether it lists all indexes, paginates, or when an agent should prefer get_index for a single index.

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