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

No annotations exist, so the description carries the full burden. It does disclose genuinely valuable behavior — paid access at $0.03 USDC on Base via x402, an in-band payment channel, and a mirror HTTP endpoint — but says nothing about what filters default to, whether they AND together, or what a result row looks like.

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?

Two short sentences, front-loaded with the resource and scope, with pricing and alternate endpoint packed efficiently. Slightly telegraphic with the bracketed tag and inline `_meta` jargon, but no wasted sentences.

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 six optional parameters, no output schema, and no annotations, the description leaves too much unexplained: no return-shape hint, no filter semantics, no note on how `pass` interacts with the $0.03 charge or what happens on payment failure. Adequate for identifying the endpoint, insufficient for calling it correctly.

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 coverage is only 17% (only `pass` is documented), so the description must compensate and largely doesn't. It also creates ambiguity: it declares 'Window is 90 days' as fixed while the schema exposes a free-form `window` string, and never explains `kind`, `minTvlUsd`, `triggerOnly`, or `minRulesPassed` (the last being an integer capped at 4 with unexplained semantics).

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 ('growth-lane screen') with scope ('across covered chains and apps') and a fixed 90-day window, so the agent knows this is a filtered market-data read. It does not explicitly distinguish itself from close siblings like get_growth_history, get_growth_setup, or get_value_screen, so the agent must guess at the growth-vs-value / screen-vs-history split.

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 guidance on when to use this instead of the many sibling screens (get_value_screen) or growth feeds (get_growth_history, get_growth_setup). The only usable context is payment mechanics, not invocation conditions.

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