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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds two useful behavioral facts beyond annotations — that results are paginated and that the tables are 'public' (implying no auth) — but says nothing about rate limits or result ordering, so value added is modest.

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?

Two sentences, no waste: the first front-loads the verb, resource, and driving parameters, the second handles sibling disambiguation. Nothing needs trimming and nothing important is buried.

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?

An output schema and annotations exist, so return values and safety need not be explained. Purpose and routing are complete for a paginated list tool; only a minor gap remains (the undocumented-by-description page param) and it is fully covered by 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 100%, so all four parameters (including page, which the description omits) are fully documented in the schema. The description restates kind/vs_currency/limit but adds no syntax or semantics beyond what the schema already provides — the correct baseline when the schema does the heavy lifting.

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 verb ('Fetch') and resource ('paginated exchange rows from CoinGecko's public exchange tables') and explicitly distinguishes itself from the singular sibling coingecko_exchange. An agent can route between the two without opening either schema.

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?

Names the alternative (coingecko_exchange) and the condition that selects it ('for one exchange's profile and markets'), giving a clear routing rule. However it does not add further when/when-not guidance, e.g. when to prefer this over other list tools such as coingecko_markets.

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