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Trading 212 Controlled MCP

execute_confirmed_action

Execute a previously previewed Trading 212 market order or pending-order cancellation after direct user confirmation. Single-use token expires in five minutes; no automatic retries.

Instructions

Execute exactly one previously previewed market order or pending-order cancellation. Call only after the user directly confirms the exact preview. The confirmation token is single-use and expires after five minutes; executions are never retried automatically.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
confirmationYesMust be the exact word EXECUTE after the user directly confirms this preview.
confirmationTokenYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.1.0

TDQS

A4.7/5.0
Behavior5/5

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

No annotations exist, so the description carries the full disclosure burden. It surfaces important behavior: the token is single-use, expires after five minutes, and executions are never retried automatically. These details go well beyond a generic 'execute' statement.

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?

Two compact sentences front-load the core action, then add usage constraints with no filler. Every clause earns its place, and the most critical safety condition appears early.

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

Completeness5/5

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

For a simple two-parameter tool with no output schema and no annotations, the description covers the action, the mandatory confirmation prerequisite, and the token's behavior. An agent has enough context to select and invoke it correctly without additional information.

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

Parameters4/5

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

Schema coverage is 50%; the confirmation parameter is fully described in the schema, while confirmationToken only has a uuid format. The description compensates by explaining token lifecycle (single-use, five-minute expiry) and ties it to the previous preview, adding meaning 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 opens with a specific verb ('Execute') and resource ('previously previewed market order or pending-order cancellation'), making the action unmistakable. It clearly distinguishes this from the read and preview siblings by describing the execution step that follows user confirmation.

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?

It states a hard precondition: 'Call only after the user directly confirms the exact preview.' This tells the agent exactly when this tool is appropriate versus the preview alternatives, though it does not explicitly name sibling tools or list exhaustive when-not scenarios.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.