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Pcummings

sparkpost-mcp

by Pcummings

update_template

Modify an existing email template's subject, HTML, or text content, with option to update the published version.

Instructions

Update an existing template

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
htmlNo
textNo
subjectNo
template_idYes
update_publishedNo
Behavior2/5

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

With no annotations provided, the description carries the full burden of disclosing behavioral traits, but it only states the basic action. It does not mention whether the update is partial or full, what happens to excluded fields, the effect of the update_published parameter, or any required permissions.

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 concise single sentence, but it lacks essential detail about parameters and behavior. It is not verbose, but it is under-informative for a tool with 5 parameters and no annotations.

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 the tool has 5 parameters, no output schema, and no annotations, the description is insufficient. It does not explain return values, side effects, or how to use parameters like update_published, making it incomplete for an agent to invoke correctly.

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?

Schema description coverage is 0%, meaning the description does not explain any of the 5 parameters. The description adds no meaning beyond the schema field names, leaving the agent without guidance on how each parameter affects the update.

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 'Update an existing template' clearly identifies the action (update) and the resource (template), distinguishing it from sibling tools like create_template, get_template, and list_templates which have different verbs or resource states.

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, no prerequisites, no when-not-to-use conditions. It simply states what it does without contextual usage advice.

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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