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by io.github.QBT-Labs
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cancel_order

Cancel a specific order by ID on a supported exchange

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": {
      "exchange": "<exchange>",
      "symbol": "<symbol>",
      "orderId": "<orderId>"
    },
    "name": "cancel_order"
  }
}

Input Schema

NameRequiredDescriptionDefault
symbolYesTrading pair symbol (e.g., BTC/USDT, INDY/USDT)
orderIdYesThe order ID to cancel
exchangeYesExchange to query. Supported: mexc, gateio, bitget, kraken

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observed

TDQS

A3.7/5.0
Behavior2/5

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

The tool has no annotations, so the description bears the full disclosure burden, yet it only says 'Cancel', a mutation, without stating whether cancellation is irreversible, idempotent, or what happens to a filled/canceled order. Permissions, confirmation, and error behavior are not covered.

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 with no filler; the key qualifier 'specific' and 'by ID' are up front, and the exchange constraint is stated once. Every word earns its place.

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

Completeness3/5

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

For a simple three-parameter mutation, the description conveys the core operation, and the schema fills in parameter details. However, with no annotations and no output schema, it omits behavioral context like response shape, failure modes, and cancellation guarantees, making it minimally viable.

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?

The input schema already documents all three parameters (exchange, symbol, orderId) at 100% coverage, so the description need not repeat them. It adds a slight framing with 'by ID' but no new semantic detail, matching the baseline.

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 the specific action (cancel), the exact target (an order identified by ID), and the scope (a single order on a supported exchange). This clearly distinguishes it from sibling cancel_all_orders, which targets multiple orders.

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

Usage Guidelines4/5

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

The phrase 'a specific order by ID' establishes the primary use case: canceling one known order. It does not explicitly mention when to use cancel_all_orders or other alternatives, but the context is clear enough for an agent to select it for individual cancellations.

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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