barker_market_overview

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

No annotations provided; description implies a read-only snapshot but does not explicitly state it or disclose caching/authorization details. Adequate for a simple parameterless tool, but could be more transparent.

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 concise sentences: first defines purpose, second provides usage examples and a formatting note. No superfluous words, well-structured.

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 zero parameters, no output schema, and no annotations, the description sufficiently covers what the tool does, when to use it, and how to interpret results. No major gaps.

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?

No parameters exist; description adds value by explaining output format (share_pct as decimals). Schema coverage is 100%, so baseline of 3 is met; extra clarity raises score.

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?

Clearly states 'Stablecoin market snapshot' and lists specific data points (total market cap, yield-bearing cap, asset/chain distribution). Distinct from siblings which cover vaults, trends, and payment stats.

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?

Provides example queries ('stablecoin market cap', 'USDT market share', '稳定币市场份额') and notes decimal format for share_pct. No explicit exclusion of alternatives, but examples sufficiently guide usage.

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