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

With no annotations, the description carries the full burden and does well: it discloses a hard rate limit (5 calls/day per IP), that no payment/auth is required, and that output matches the paid tool. It does not explain quota-exceeded behavior or error responses, but the core behavioral traits are surfaced.

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 sentence with a parenthetical; the free-demo framing and quota are front-loaded, and there is no redundant or filler text.

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 dispatcher with no annotations and no output schema, the description covers the key facts an agent needs: quota, cost, tool choices, and output parity with the paid versions. Remaining details (quota-exceeded errors, per-tool return differences) are minor gaps.

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 100%, so the schema already documents both the 'tool' enum and the 'address' pattern plus the AERO-example fallback. The description restates the tool enum values but adds no syntax or format detail beyond what the schema provides, so baseline 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 concrete action (run one of five named analysis tools) and pinpoints the tool's role as a free demo wrapper around the paid siblings. It distinguishes itself from the sibling tools by the demo/quota framing, though a reader must infer from the tool list exactly how this proxy relates to each sibling.

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?

It clearly states the conditions for use: free, 5 calls/day per IP, no payment, and enumerates which tools can be invoked. It lacks explicit when-not guidance (e.g., what to do once the quota is exhausted, or when to switch to the paid equivalent).

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