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

No annotations exist, so the description carries the full burden and does meaningful work: it discloses cost ($0.01 USDC on Base via x402), that results are one-shot (not streamed/paged), and that the content is informational data rather than advice. It omits latency/freshness of 'latest' and what happens with limit, keeping it from a 5.

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?

Front-loaded with the core purpose, the field list is compact, and payment/disclaimer details follow. Every sentence adds something, though the inline field enumeration is dense and could be tightened.

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?

With no output schema, listing the return fields is valuable, and cost disclosure is important for a paid x402 endpoint. However, the description leaves 'latest' undefined (how fresh), gives no guidance on limit, and does not contrast with alerts_sample, so an agent still has 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?

The single parameter 'limit' has 0% schema description coverage, so the description is responsible for explaining it, but it never mentions limit at all. The agent must infer its meaning and the 1-50 range purely from the schema constraints.

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?

States a specific verb+resource ('latest factual market alerts') and enumerates the returned fields (symbol, time, signal type, price, % move, timeframe, source), which tells an agent exactly what it gets. It doesn't explicitly distinguish itself from the sibling alerts_sample, so it stops short of a 5.

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?

'One-shot' implies a single call with no pagination loop, which hints at usage context, but there is no explicit statement of when to call this versus alerts_sample, nor any prerequisite or exclusion. Usage is only implied.

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