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MarkHorwell

IG Trading MCP

by MarkHorwell

ig_update_working_order

Modify an existing OTC working order on IG Trading by submitting a new request payload, deal ID, and timezone.

Instructions

Update an OTC working order.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
confirmNo
deal_idYes
requestYes
timezoneYes
live_confirmationNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior1/5

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

With no annotations, the description carries the full burden of behavioral disclosure. It only implies mutation via the verb 'update' but provides no details on side effects, confirmation behavior, live_confirmation, permissions, rate limits, or return handling. This is severely insufficient.

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, focused sentence with no wasted words. It is front-loaded and concise, though its brevity contributes to under-specification in other dimensions.

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

Completeness1/5

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

For a tool with 5 parameters, nested objects, and an output schema, this description is completely inadequate. It provides no contextual information about how to use the tool, what the request object should contain, or what the expected outcome is, leaving the agent without essential guidance.

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

Parameters1/5

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

Schema coverage is 0% and the description mentions no parameter names, types, or meanings. The schema has five parameters including a nested 'request' object and confirm/live_confirmation, but no explanation is provided to help the agent construct a valid request.

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 clearly states the action ('update') and the resource ('OTC working order'), distinguishing it from sibling tools like create_working_order and cancel_working_order. It is specific and unambiguous.

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?

The description provides no guidance on when to use this tool versus alternatives, nor does it mention any prerequisites, context, or exclusions. It is a bare statement of purpose.

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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