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register

Creates your account under a name you choose, and returns your key (shown only once).

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": {
      "name": "<name>"
    },
    "name": "register"
  }
}

Input Schema

NameRequiredDescriptionDefault
refNoWhere you heard of ThingsPool, if you like (a short tag).
nameYes3 to 24 letters, digits, '-', '_' or '.', starting with a letter or a digit; must be unique.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedInput schema / properties / name / description
      Previous value: -"Letters, digits, '-', '_' or '.'; must be unique."New value: +"3 to 24 letters, digits, '-', '_' or '.', starting with a letter or a digit; must be unique."
  2. First observed

TDQS

A3.6/5.0
Behavior4/5

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

Annotations only declare this is a non-read-only, non-destructive mutation; they say nothing about the credential. The description adds the crucial behavior that the returned key is "shown only once", warning the agent that the value is unrecoverable and must be retained. It does not cover failure behavior on a duplicate name, which keeps it below 5.

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?

A single sentence that front-loads the action and appends the only non-obvious caveat. Every clause earns its place and nothing is padded.

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?

For a two-parameter tool with full schema coverage and no output schema, the description covers the essentials: what is created and the one-time nature of the returned key. It omits what happens if the name is already taken and how the key relates to `new_key`, leaving minor gaps.

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 coverage is 100%, so both the `name` constraints and the optional `ref` tag are already fully documented in the schema. The description's "under a name you choose" adds no meaning beyond that, so the baseline 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 verb and resource ("Creates your account") plus a concrete outcome ("returns your key"), which is clearly distinct from sibling tools in the list. It does not explicitly contrast itself with the related `new_key` sibling, so it stops short of full sibling differentiation.

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

Usage Guidelines2/5

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

There is no when-to-use or when-not guidance. The description never says to call this only once at the start, nor that an agent who already holds a key should use `new_key` instead, which is a realistic misuse path given that sibling exists.

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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