market_overview

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

No annotations are provided, and the description does not disclose data source, request behavior, rate limits, or whether an API key is required or optional. The presence of an api_key parameter is not addressed, leaving operational behavior opaque.

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 compact and front-loaded with the main purpose, followed by a useful bullet-style list of deliverables and concrete example prompts. Every sentence contributes meaningful information without redundancy.

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?

The output schema handles return values, and the listed metrics give a good sense of the tool's scope. However, missing guidance on the api_key parameter and lack of behavioral or alternative-tool context leave the description only minimally complete.

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 input schema has one parameter, api_key, with 0% schema description coverage, and the description does not mention it at all. This fails to compensate for the low schema coverage, giving the agent no additional guidance on how or whether to supply the key.

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 a specific verb and resource: 'Get the global crypto market overview.' It then enumerates the included metrics (market cap, 24h volume, BTC/ETH dominance, active counts), which distinguishes it from sibling tools like price, trending, and top_coins.

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 example prompts give concrete usage context, such as asking for total crypto market cap or Bitcoin dominance. However, it does not explicitly mention when not to use the tool or direct users to alternatives, so it misses the top level of guidance.

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