ScorpTech x402 Tools

Practical Count

practical_count

Read-onlyIdempotent

How many practical numbers are from 1 through n. There are 5 through 10, and 15 through 40. n runs from 1 to 5000. Price: $0.001 USDC per successful call (x402, Solana). Same tool over HTTPS: POST https://scorptech.it.com/api/x402/v1/practical-count

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "n": "<n>"
    },
    "name": "practical_count"
  }
}

Input Schema

Name	Required	Description	Default
`n`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

AddedOct 23, 2026

TDQS

A3.5/5.0

Behavior4/5

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

Annotations already declare readOnly/idempotent/openWorld, so the bar is lower, and the description still adds genuinely useful operational context: a per-call price of $0.001 USDC via x402 on Solana and an equivalent HTTPS endpoint. It does not describe the response payload or any failure modes.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness3/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Front-loaded and brief, with cost/endpoint details trailing sensibly. However, the parenthetical 'There are 5 through 10, and 15 through 40' is ambiguous noise — it is unclear whether it refers to practical numbers, ranges, or example outputs — and distracts from the core definition.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a one-parameter read-only count tool with no output schema, this is close to sufficient, but it never defines what a 'practical number' is nor confirms that the return value is a single count, leaving the agent to infer the output shape.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, but the single parameter is a self-documenting integer with min/max in the schema. The description's 'n runs from 1 to 5000' merely restates those constraints rather than adding new meaning (e.g., performance implications at large n).

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource: counting practical numbers in the range 1..n, with the input bound spelled out. It implicitly distinguishes itself from the sibling `practical` (which presumably tests a single number), but never names that sibling explicitly.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The range constraint 'n runs from 1 to 5000' tells the agent when the call is valid, but there is no guidance on when to prefer this over `practical`, nor any note on what to do for numbers outside the range. 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.

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