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One applied-for string

ud_get_tld_application_string
Read-onlyIdempotent

One applied-for string: its applications and its change history. Pass string (such as studio).

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": {
      "string": "<string>"
    },
    "name": "ud_get_tld_application_string"
  }
}

Input Schema

NameRequiredDescriptionDefault
fieldsNoComma-separated top-level keys to keep: string, applications, changes.
stringYesThe applied-for string, lowercased ASCII (an IDN as its A-label).

Output Schema

NameRequiredDescriptionDefault
dataNo
metaNoThe day of the answer, and the page cursor of a list.
linksNoLinks of the answer.

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observed

TDQS

A3.5/5.0
Behavior3/5

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

The annotations already declare readOnly, idempotent, non-destructive and closed-world, so the safety profile is covered without prose. The description adds that the payload bundles both applications and change history, which is useful, but it says nothing about failure behavior for a missing or malformed string or about result size.

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?

Two short sentences, front-loaded with the resource and payload, with no padding. Minor deduction because the opening phrase largely restates the title rather than adding new information.

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 full schema coverage, full annotations and an output schema, the remaining burden is small, and the description covers identity and payload contents. Only edge-case behavior (string not found, empty change history) is left unaddressed.

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 100% and both parameters are documented there, including the A-label lowercasing rule and the fields projection. The description only supplies an inline example value (studio), which adds a little concreteness but no meaning beyond the schema, so the baseline of 3 applies.

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?

The description names a specific resource (one applied-for string) and the two things it returns (applications and change history), which lets an agent separate it from list-style siblings such as ud_list_tld_applications and ud_list_tld_application_changes. It does not name those siblings explicitly, so it stops short of a 5.

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?

"Pass `string` (such as studio)" implies the lookup-by-identifier usage, but there is no explicit statement of when to prefer this over the list siblings, nor any note about what happens when the string is unknown. Guidance is implied rather than stated.

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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