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

No annotations are provided, so the description must carry the full behavioral burden. It discloses the data source (exchange API, no aggregator), the return fields (price, size, side, timestamp), and limit defaults (50, max 200). However, it omits other behavioral traits such as authentication requirements (implied 'public' but not explicit), rate limits, or error behavior. A 3 reflects partial but incomplete 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?

The description is a single, well-structured paragraph that front-loads the purpose and then details parameters and returns. Every sentence contributes useful information without redundancy, making it highly concise and scannable.

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 tool's simplicity (a read-only trade fetcher), the absence of an output schema, and no annotations, the description covers purpose, parameters, and return fields sufficiently. It could mention pagination or rate limits, but these are minor for a recent-trades endpoint. A 4 indicates it is nearly 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?

Schema description coverage is 0%, so the description must compensate for undocumented parameters. It does so thoroughly: it enumerates valid exchange values, explains symbol format with examples ("BTC" or "BTCUSDT"/"BTC/USDT"), and specifies limit default and maximum. This adds substantial meaning beyond the bare schema types, meriting a 5.

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 states a specific verb and resource: 'Recent public trades (tape) for a symbol', with the source ('straight from the exchange API — no aggregator'). This clearly distinguishes it from data-type siblings like get_klines or get_orderbook, though it does not name a specific sibling. A 4 is appropriate: clear purpose but no explicit sibling routing.

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 by describing the data type and source, but does not state when to prefer this over alternatives such as get_klines or get_orderbook, nor when not to use it. No explicit when/when-not guidance is present, so a 3 reflects implied usage only.

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