coingecko_chains

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

No annotations are provided, so the description carries full burden. It only states it returns normalized rows and supports vs_currency. It does not disclose whether it is read-only, if authentication is needed, rate limits, pagination, or what 'normalized' implies. For a data retrieval tool, this is insufficient behavioral context.

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 description is only two sentences, very short and to the point. It front-loads the purpose. However, it lacks structure (e.g., bullet points or sections) and could incorporate more detail without losing conciseness.

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 simple listing tool with no output schema and two parameters, the description covers the basic purpose and one parameter hint. However, it misses context like output format, pagination behavior, and what 'normalized' means. It is adequate but not thorough.

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 coverage is 100% with both parameters described. The description adds only that vs_currency is an enum (documented elsewhere), which is marginal value. The limit parameter is fully covered in schema. Baseline 3 is appropriate as 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?

The description clearly states it returns normalized chain rows from the CoinGecko public website chains table, which is specific and identifies the resource. However, it does not explicitly differentiate from the sibling tool 'coingecko_chain' (singular), which could be for a single chain. The verb 'Returns' is clear, but lack of sibling distinction prevents a 5.

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 provided on when to use this tool vs alternatives like coingecko_chain for single chain details or coingecko_markets for market data. There is no mention of prerequisites, exclusions, or typical scenarios. The description only states what it does, not when to choose it.

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