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by io.github.sunholo-data
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Sign in with a device code

mcpAuth

Start device authorization to get an API key. Returns device_code, user_code, and verification URL. The agent should display the verification URL to the user, who signs in and approves the code. Then call mcpAuthPoll with the device_code. MCP wrappers don't have HTTP request headers, so provenance is empty here.

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": {
      "label": "<label>"
    },
    "name": "mcpAuth"
  }
}

Input Schema

NameRequiredDescriptionDefault
labelYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observed

TDQS

A4.2/5.0
Behavior4/5

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

Annotations mark this as non-read-only, open-world, non-idempotent; the description goes beyond them by disclosing the return payload (device_code, user_code, verification URL), the required user action, the follow-up call, and the unusual note that provenance is empty because MCP wrappers lack HTTP headers. Missing details on code expiration or rate limits keep it from a 5.

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

Conciseness4/5

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

Purpose and return values are front-loaded, and each sentence carries actionable information (display URL, poll next, provenance note). The provenance sentence is tangential to invoking the tool but is short and harmless.

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

Completeness4/5

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

With no output schema, the description responsibly enumerates the returned fields and the endpoint handoff to mcpAuthPoll, giving the agent enough to drive the flow. The unresolved 'label' parameter and absence of expiration/error handling are the only gaps.

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

Parameters2/5

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

Schema description coverage is 0% and there is one required parameter, 'label', whose meaning, format, or purpose is never explained in the description. The description must compensate for the undocumented parameter and does not, leaving the agent to guess what value to supply.

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?

States a specific verb and outcome ('Start device authorization to get an API key') and names the exact next sibling (mcpAuthPoll), so an agent can distinguish this initiation step from the polling step and from mcpAccount without opening either schema.

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?

Gives explicit usage: display the verification URL to the user, wait for approval, then call mcpAuthPoll with the device_code. This is a complete when-to-use and what-to-do-next instruction naming the alternative sibling. The only omission is a 'when not to use' (e.g. if an API key already exists), which is minor.

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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