Binance.US MCP Server

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

With no annotations provided, the description carries full burden for behavioral disclosure but offers minimal information. It states what the tool does but doesn't describe response format, rate limits, authentication requirements, error conditions, or whether it's a real-time or cached price. For a financial data tool with zero annotation coverage, this represents significant behavioral transparency gaps.

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 extremely concise at just 5 words, front-loading the essential information ('Get latest price') immediately. Every word earns its place, with no redundant or unnecessary information. The structure is optimal for a simple data retrieval tool, though this conciseness comes at the expense of completeness in other dimensions.

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 the lack of annotations and output schema, plus the financial data context, the description is insufficiently complete. It doesn't explain what format the price data returns (single value vs. structured object), whether it includes timestamp information, how current 'latest' actually is, or any limitations. For a price data tool in a complex financial API ecosystem, more context would be valuable despite the simple parameter structure.

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 schema has 100% description coverage, with both parameters ('symbol' and 'symbols') clearly documented as mutually exclusive options for specifying trading pairs. The description adds no additional parameter information beyond what's in the schema, but since schema coverage is complete, the baseline score of 3 is appropriate. The description's mention of 'symbol(s)' aligns with but doesn't enhance the schema documentation.

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 action ('Get latest price') and target ('for symbol(s)'), making the purpose immediately understandable. It distinguishes itself from siblings like 'binance_us_ticker_24hr' or 'binance_us_avg_price' by focusing specifically on current price retrieval rather than historical or aggregated data. However, it doesn't explicitly mention the exchange context (Binance US) which is implied by the tool name.

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 provides no guidance on when to use this tool versus alternatives. With many sibling tools like 'binance_us_ticker_24hr' (24-hour statistics), 'binance_us_avg_price' (average price), and 'binance_us_order_book' (order book data), there's no indication of when this specific price retrieval tool is most appropriate. The description lacks any context about use cases, prerequisites, or comparisons to similar tools.

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