coingecko_global

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

No annotations are provided, so the description carries full burden. It mentions 'normalized global market metrics' but does not disclose specifics like data freshness, rate limits, or whether it's a read-only operation. Minimal behavioral disclosure.

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 short, front-loaded sentences with no wasted words. The purpose is immediately clear, achieving high 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?

Given no output schema and no parameters, the description should elaborate on what 'global market metrics' entail (e.g., market cap, volume). Without this, the agent lacks information to interpret the tool's return value, making it incomplete.

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?

With zero parameters and schema coverage at 100%, the baseline is 4. The description adds value by describing the output as 'normalized global market metrics,' which provides meaning beyond the empty input schema.

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 the tool returns 'global market metrics' from CoinGecko, specifying the resource and action. Among siblings like coingecko_coin and coingecko_markets, this distinguishes itself as a broad snapshot, fulfilling the purpose clarity dimension.

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?

The description implies usage for obtaining a global market snapshot but provides no explicit guidance on when to use this tool versus alternatives like coingecko_global_charts or coingecko_markets. Lack of when/when-not guidance reduces clarity.

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