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

No annotations are provided, so the description carries the full behavioral burden. It hints at a paid access model ('0.01 via x402 (USDC on Base)') and free-tier wallet credits, but the payment sentence is malformed and does not clarify rate limits, read-only behavior, failure behavior, or what exactly happens at execution.

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 first sentence is reasonably concise and front-loaded with the signal components. However, the second sentence is an unclear fragment ('Turns raw Price 0.01 via x402') that appears truncated or typo-ridden, hurting structural quality.

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?

For a tool with a single optional parameter and no output schema, the description lists key returned signal components, which is helpful. But it fails to clearly explain the payment/cost mechanism and does not describe the output structure or any additional execution context, leaving meaningful 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?

Schema description coverage is 100%, so the schema already fully documents the optional wallet parameter and its free-tier effect. The description adds no additional parameter semantics, so the appropriate baseline is 3.

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 clearly identifies a live computed signal over on-chain crypto and lists concrete outputs (30-period percentile rank, 4-period momentum, trend verdict), which separates it from many raw-data siblings. However, the garbled phrase 'Turns raw Price 0.01 via x402' muddies the resource and prevents 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?

There is no guidance about when to select this tool versus the many sibling processed_btc_* tools or other signal tools. The description explains what it computes but never states when to use it, when not to use it, or which alternative fits a different need.

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