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GetMailer MCP Server

by getplatform

create_template

Create reusable email templates with dynamic variables for consistent transactional email campaigns in GetMailer.

Instructions

Create a new email template

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYesTemplate name
subjectYesEmail subject (can include {{variables}})
htmlYesHTML content (can include {{variables}})
textNoPlain text content (optional)

Implementation Reference

  • src/index.ts:158-183 (registration)
    Registration of the 'create_template' tool in the ListTools response, including name, description, and input schema definition.
    {
      name: 'create_template',
      description: 'Create a new email template',
      inputSchema: {
        type: 'object' as const,
        properties: {
          name: {
            type: 'string',
            description: 'Template name',
          },
          subject: {
            type: 'string',
            description: 'Email subject (can include {{variables}})',
          },
          html: {
            type: 'string',
            description: 'HTML content (can include {{variables}})',
          },
          text: {
            type: 'string',
            description: 'Plain text content (optional)',
          },
        },
        required: ['name', 'subject', 'html'],
      },
    },
  • Handler implementation for 'create_template': performs a POST request to '/api/templates' API endpoint with the input arguments and returns the JSON response.
    case 'create_template': {
      const result = await apiRequest('/api/templates', {
        method: 'POST',
        body: JSON.stringify(args),
      });
      return {
        content: [{ type: 'text' as const, text: JSON.stringify(result, null, 2) }],
      };
    }
Behavior2/5

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

With no annotations provided, the description carries full burden but only states it creates a template without disclosing behavioral traits. It doesn't mention permissions required, whether creation is idempotent, rate limits, or what happens on success/failure (e.g., returns a template ID). This leaves significant gaps for a mutation tool.

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, efficient sentence with zero waste. It's appropriately sized and front-loaded, directly stating the tool's purpose without unnecessary elaboration.

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?

Given this is a mutation tool with no annotations and no output schema, the description is incomplete. It doesn't explain what happens after creation (e.g., returns a template ID for use in 'send_email'), error conditions, or dependencies on other tools like 'verify_domain'. More context is needed for effective use.

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 schema fully documents all parameters (name, subject, html, text). The description adds no additional meaning beyond implying these parameters are used for creation, which is already clear from the tool name. Baseline 3 is appropriate as the schema does the heavy lifting.

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

Purpose4/5

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

The description clearly states the action ('Create') and resource ('new email template'), making the purpose immediately understandable. However, it doesn't distinguish this from sibling tools like 'list_templates' or 'get_email', which would require mentioning it's specifically for creation rather than retrieval or listing.

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. There's no mention of prerequisites (e.g., needing a verified domain), when not to use it, or how it differs from sibling tools like 'send_email' or 'create_batch' for email-related tasks.

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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