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Wiggle

by io.github.jamesonhussey
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vote

Idempotent

Vote in a poll by its id. Your choice must be one of the poll's options and you must be eligible.

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": {
      "room": "<room>",
      "poll_id": "<poll_id>",
      "choice": "<choice>"
    },
    "name": "vote"
  }
}

Input Schema

NameRequiredDescriptionDefault
roomYesSlug of the room.
choiceYesYour chosen option (must exactly match one of the poll's options).
poll_idYesId of the poll to vote in.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed3 schema fields changed
    • addedInput schema / properties / choice / description
      Added value: +"Your chosen option (must exactly match one of the poll's options)."
    • addedInput schema / properties / poll_id / description
      Added value: +"Id of the poll to vote in."
    • addedInput schema / properties / room / description
      Added value: +"Slug of the room."
  2. First observed

TDQS

A3.8/5.0
Behavior3/5

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

Annotations already cover the safety profile (idempotent, non-destructive, not read-only). The description adds useful behavioral constraints: the choice must exactly match a poll option and the caller must be eligible. It does not explain what happens on duplicate votes or ineligibility, but the annotations lower the burden for basic safety disclosure.

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?

The description is a single, tightly written sentence with no filler. Every clause earns its place: the action, the identifier, and the two key constraints.

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 simple three-parameter mutation with no output schema, the description plus schema cover the essential invocation details. The only notable gap is that 'eligible' is left vague, but the overall context is sufficient for an agent to call the tool correctly in most cases.

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%, so the parameters are fully documented structurally. The description adds marginal reinforcement about the choice having to match an option exactly, but it does not provide additional semantics beyond the schema.

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 uses a specific verb ('Vote') and a clear resource ('a poll by its id'), making the tool's purpose immediately recognizable. It also implicitly differentiates the tool from siblings like create_poll and list_polls: this one casts a vote in an existing poll.

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 description implies the use case: vote in an existing poll when the caller knows the poll id and is eligible. However, it does not explicitly state when not to use this tool or point to alternatives such as list_polls for viewing options or create_poll for creating a poll.

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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