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deyikong

SendGrid MCP Server

by deyikong

Update Template Version

update_template_version

Update the content and settings of an existing email template version, including name, subject, HTML, and plain text.

Instructions

Update the content and settings of a template version

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
template_idYesID of the template
version_idYesID of the version to update
nameNoNew name for this version
subjectNoEmail subject line (supports Handlebars)
html_contentNoHTML content of the email template
plain_contentNoPlain text version
activeNoSet as active version (1 = active, 0 = inactive)
generate_plain_contentNoAuto-generate plain text from HTML
test_dataNoJSON string of test data for Handlebars variables
Behavior2/5

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

With no annotations, the description carries full burden but fails to disclose any behavioral traits beyond 'update'. It does not mention idempotency, side effects, or authentication needs.

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 that is front-loaded. It is efficient but lacks depth.

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?

For a tool with 9 parameters and no output schema, the description is too brief. It does not explain return behavior, partial updates, or required relationships between parameters.

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% with detailed parameter descriptions, so the baseline is 3. The description adds no extra meaning beyond 'content and settings'.

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 ('Update') and the target resource ('template version'). It is specific enough to distinguish from sibling tools like create_template_version or delete_template_version, but does not elaborate on scope.

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?

No guidance is provided about when to use this tool versus alternatives such as create_template_version or update_template. The description offers no context for decision-making.

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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