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deyikong

SendGrid MCP Server

by deyikong

Create Template Version

create_template_version

Create a new version of an email template with custom HTML, subject, and settings. Specify template ID, name, and optional test data for Handlebars variables.

Instructions

Create a new version of a template with HTML content and settings

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYesName for this version
activeNoSet as active version (1 = active, 0 = inactive)
subjectYesEmail subject line (supports Handlebars)
test_dataNoJSON string of test data for Handlebars variables
template_idYesID of the template to add version to
html_contentYesHTML content of the email template (supports Handlebars)
plain_contentNoPlain text version (optional)
generate_plain_contentNoAuto-generate plain text from HTML
Behavior2/5

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 only mentions 'create' and 'settings', but does not address side effects, permissions, rate limits, or whether the version becomes active by default. The schema includes 'active' and 'generate_plain_content' but the description omits these details.

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

Conciseness3/5

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

The description is a single sentence, which is concise but lacks structure. It does not front-load key information or use formatting to aid scanning. It is not overly verbose, but it could be better organized.

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 8 parameters and no output schema, the description is too brief. It does not explain the return behavior, what happens when a version is created, or how 'active' and 'generate_plain_content' interact. It feels incomplete for a creation tool.

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 baseline is 3. The description adds no additional meaning beyond the schema; it merely states 'HTML content and settings' without elaborating on optional parameters like 'test_data' or 'generate_plain_content'. It does not enhance understanding.

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 ('Create a new version'), the resource ('a template'), and the key content ('HTML content and settings'). It distinguishes from siblings like 'update_template_version' and 'create_template' by specifying it adds a version to an existing template.

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 (e.g., 'update_template_version' for modifying an existing version) or prerequisites (e.g., template must already exist). It lacks explicit usage context.

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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