agentcard

verify_phone

Check the one-time code the user received from start_phone_verification. On success the balance is unlocked for funding (the verification stays fresh for 60 days) — call add_funds next. A wrong or expired code returns a recoverable status so you can ask the user to re-check it, or call start_phone_verification to resend.

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": {
      "code": "<code>"
    },
    "name": "verify_phone"
  }
}

Input Schema

Name	Required	Description	Default
`code`	Yes	The one-time code the user received, as a string (keep any leading zeros — do not send it as a number).

Output Schema

Name	Required	Description	Default
`message`	Yes	Human-readable result or next step.

Schema Changelog

Changes observed during successful MCP inspections.

First observedJul 28, 2026

TDQS

A4.7/5.0

Behavior4/5

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

Annotations are minimal (readOnlyHint=false, etc.). The description adds key behavioral context: on success the balance unlocks for funding, verification lasts 60 days, and wrong/expired codes return a recoverable status. However, it doesn't detail the exact structure of the recoverable status or any other side effects.

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

Conciseness5/5

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

Two sentences, no wasted words. Front-loaded with purpose and immediate usage context. Every sentence provides necessary information without redundancy.

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

Completeness5/5

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

For a single-parameter tool with an output schema, the description covers input expectations, success/failure behavior, and next steps. It is fully adequate for an agent to select and invoke correctly.

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

Parameters4/5

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

Schema coverage is 100% with one parameter (code). The description adds crucial semantic instruction: 'keep any leading zeros — do not send it as a number'. This exceeds the schema's description, which only says 'as a string'.

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

Purpose5/5

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

The description clearly states the tool checks a one-time code from start_phone_verification. It distinguishes itself from siblings by naming start_phone_verification and add_funds as related but distinct actions.

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

Usage Guidelines5/5

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

Explicitly says when to use (after start_phone_verification, before add_funds), what to do on success (call add_funds), and how to handle failure (ask user to re-check or resend). Provides clear contextual guidance.

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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