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Snouzy

@m6b9/mcp-mailchimp

by Snouzy

update_segment

Update a Mailchimp segment's name, match type, or conditions to refine audience targeting.

Instructions

Update a segment's name or conditions

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameNoNew segment name
matchNoMatch condition
list_idYesThe audience/list ID
conditionsNoUpdated conditions
segment_idYesThe segment ID
static_segmentNoUpdated email list for static segment
Behavior2/5

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

Annotations are absent, so the description must disclose behavioral traits. It only states the action without explaining whether updates are partial or full replacements, how missing optional fields are handled, or potential side effects. For a mutation tool, this lack of detail is a notable gap.

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, front-loaded sentence with no filler or redundant information. It is efficient but borderline under-specified, lacking context that could be added without excessive length.

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?

With 6 parameters, 2 required, no annotations, and no output schema, the description is too thin to fully guide an agent. It omits return value expectations, update semantics (e.g., replacement vs merge), and any edge-case behavior. The tool would benefit from more explicit behavioral guidance.

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 input schema already documents all six parameters with individual descriptions. The tool description adds no new syntactic or format detail beyond mentioning 'name or conditions'. Therefore, the baseline of 3 is appropriate.

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 verb 'Update' and the resource 'segment', making it unambiguous which operation it performs. It distinguishes itself from sibling tools like create_segment, delete_segment, and get_segment by focusing on the update action. The scope ('name or conditions') gives specific, actionable meaning.

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 usage: use this when you need to update a segment's name or conditions. However, it provides no explicit when-to-use guidance, prerequisites (e.g., list_id and segment_id are required), or exclusions versus other update tools. This is minimal but not entirely absent.

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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