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

No annotations are provided, so the description carries the full burden. It discloses the payment gate (free preview, paid full report) and indicates the content areas covered. However, it does not mention whether the tool is read-only, potential side effects, auth requirements beyond payment, or rate limits.

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 at two sentences, with the first covering content and the second covering pricing. However, the first sentence is somewhat marketing-heavy ('Complete state...') and could be more direct about the tool's operation.

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 and no parameters, the description explains the content of the report and the pricing structure, which is helpful. But it does not specify the return value's format, how to trigger payment, or how the preview differs from the full report in practice. Some context is provided, but gaps remain.

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 tool has zero parameters, so per the baseline rule, a score of 4 applies. The description does not need to document parameters, but it also does not add any parameter-related meaning beyond the empty schema.

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 indicates what the tool provides (market overview data, revenue breakdowns, emerging players) but lacks a specific action verb like 'get' or 'list.' The scope is clear (agent economy) but the tool's exact function (e.g., returning a report) is not explicitly stated, making it somewhat vague.

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?

No guidance is given on when to use this tool instead of siblings like market_pulse or analyze_service. The only usage-related information is about payment ('Preview is free — $50 USDC via x402 unlocks the full report'), which is not contextual usage advice.

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