market_data_metadata

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

The description discloses credit behavior (indicative credits, actual in response headers) and mentions optional pagination/type filtering. However, without annotations, it does not cover response format, rate limits, or other behavioral traits, leaving a moderate gap.

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 concise and well-structured, with a clear action list and credit note. It avoids irrelevant detail, though the action bullet is slightly redundant with the main description.

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 tool is simple and the schema is fully covered, but the absence of an output schema and lack of description about the returned data leaves ambiguity about what the list will contain. The cost information and action list help, but the response format is not disclosed, so the completeness is moderate.

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 provides 100% descriptive coverage for all parameters. The description merely summarizes 'optional pagination and type filter' without adding any information beyond what the schema already documents, so it meets the baseline but adds no extra value.

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 lists supported crypto and fiat assets, with a specific action name. However, it does not explicitly differentiate from sibling tools like 'market_data_assets' or 'market_data_exchange_rates', so it is specific but not fully disambiguated.

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?

There is no guidance on when to use this tool versus alternatives. The description only provides the action and credit information without any context for selection or exclusion.

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