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kanopi

Campaign Monitor MCP Server

by kanopi

cm_update_list

Idempotent

Update a Campaign Monitor list's settings such as title, unsubscribe page, and opt-in confirmation.

Instructions

Update a list's settings.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
TitleYesList title.
listIdYesList ID.
ConfirmedOptInNoWhether the list uses confirmed opt-in.
UnsubscribePageNoURL of a custom unsubscribe page.
UnsubscribeSettingNoUnsubscribe scope setting.
ConfirmationSuccessPageNoConfirmed opt-in success page URL.
Behavior3/5

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

Annotations already indicate idempotentHint: true, so the description adds no behavioral context beyond 'Update'. It does not contradict annotations, but fails to mention that the tool is safe to retry or any side effects.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single concise sentence with no unnecessary words. However, for a tool with six parameters, it could offer slightly more context without significant bloat.

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

Completeness2/5

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

The description does not clarify whether updates are partial (PATCH) or full (PUT), nor does it indicate what is returned. Without an output schema, this information is essential for correct invocation.

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 the baseline is 3. The description adds no additional meaning beyond what the schema's property descriptions already provide.

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 tool updates a list's settings, using a specific verb ('update') and resource ('list's settings'). It distinguishes from sibling tools like cm_create_list, cm_delete_list, and cm_get_list.

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, such as cm_create_list for creation or cm_get_list for retrieval. No when-not-to-use or contextual triggers are mentioned.

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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