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

Annotations already cover the safety profile (readOnlyHint=true, destructiveHint=false), so the description need not restate that. It adds that results are rankings segmented by several metrics, but it does not reveal behavior like aggregation method, data coverage limits, or pagination. This is acceptable given the annotations, but adds no strong behavioral detail.

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?

A single, focused sentence that state the purpose and the key output dimensions without filler or redundancy. The core action and resource are front-loaded for quick parsing.

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 a full input schema, an output schema, and clear read-only annotations, the description covers what an agent needs to invoke the tool. It does not explain how to interpret the rankings or pagination, but for a straightforward read-only ranking query the provided context is sufficient.

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 schema descriptions cover the request, chain_type, and time_frame parameters fully, so the schema does the heavy lifting. The tool description adds no additional meaning to the parameters, such as how chain_type or time_frame affect the rankings, so the baseline score of 3 is appropriate.

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 verb ('Get'), a clear resource ('chain growth rankings'), and the exact dimensions being ranked (active addresses, transactions, gas fees, DEX volume). This clearly differentiates it from the many address-, token-, and prediction-market-focused sibling tools.

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 guidance on when to use this tool versus alternatives, and no exclusions or prerequisites are stated. An agent must infer from the name and metrics that it is for chain-level growth analysis rather than address-, token-, or market-specific queries.

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