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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety and data-source profile is covered. The description adds one genuinely useful behavioral fact outside the annotations — 'Free' signals no payment/auth barrier — but says nothing about freshness, rate limits, or whether the digest is stable across repeated calls.

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-loads the key qualifier ('Free.') and the topic in the first clause, then packs the content list densely; every element maps to a real section of the report. It is a long run-on sentence and the content enumeration could be tightened, but nothing is padding.

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, the description carries the return-value burden and discharges it by enumerating the report's sections, so an agent knows what it will receive. Combined with the read-only annotations and the parameter explanation, nothing essential for correct invocation is missing.

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 0% description coverage for the single date parameter, so the description must compensate, and it does: it declares the parameter optional, gives the format (YYYY-MM-DD), and explains the semantics ('for an earlier week'), implying a current-week default. It doesn't specify how far back history goes or what happens with an invalid/future date.

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 resource (a weekly report on the agent economy: x402 listings, price changes, MCP server health, Hyperliquid summary) with a concrete enumeration of contents an agent can match against intent. It never names a sibling or says what it is not, so differentiation from the many digest-like siblings (ai_changes, prices_benchmarks, checks_top) is left to inference.

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?

There is no when-to-use or when-not-to-use guidance, and no alternative tool is named. The only usage hint is the parameter note that a date retrieves 'an earlier week', which describes an input rather than the tool's place among its siblings.

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