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mailgun

Mailgun MCP Server

Official
by mailgun

get--v3-domains-domain-tag-providers

Retrieve supported email providers for a specific domain to verify compatibility and configure email delivery settings.

Instructions

List of supported providers

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
domainYes
Behavior1/5

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

No annotations are provided, so the description must fully disclose behavioral traits. It fails to do so—it does not indicate whether this is a read-only operation, if it requires authentication, what the output format might be, or any rate limits. The description is too minimal to provide any behavioral context beyond the implied 'List' action.

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 extremely concise with a single phrase 'List of supported providers', which is front-loaded and wastes no words. However, this conciseness comes at the cost of clarity and completeness, but based solely on brevity and structure, it scores highly.

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?

Given the tool has one parameter with no schema description, no annotations, no output schema, and a vague purpose, the description is completely inadequate. It fails to provide necessary context for the agent to understand what the tool does, how to use it, or what to expect, making it insufficient for effective tool invocation.

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?

The input schema has one required parameter 'domain' with 0% description coverage, and the tool description adds no information about this parameter. It does not explain what 'domain' represents (e.g., a domain name, identifier) or its role in listing providers, leaving the parameter's meaning and usage completely undocumented.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose2/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description 'List of supported providers' is vague and tautological—it essentially restates the tool name 'get--v3-domains-domain-tag-providers' without specifying what 'providers' are (e.g., email service providers, tag providers) or what action 'List' entails (e.g., retrieve, display). It lacks a clear verb-resource distinction, making it unclear what the tool actually does beyond the name.

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

Usage Guidelines1/5

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

There is no guidance on when to use this tool versus alternatives. The description does not mention any context, prerequisites, or sibling tools (e.g., other domain-tag-related tools like 'get--v3-domains-domain-tag-countries'), leaving the agent with no information on appropriate usage scenarios.

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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