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spix_email_send

Enable AI agents to send emails with customizable from, to, subject, body, and reply-to fields for automated communication.

Instructions

Send an email

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
from_addressYesSender email address
toYesRecipient email address
subjectYesEmail subject
bodyYesEmail body (plain text or HTML)
reply_toNoReply-to address
Behavior2/5

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

No annotations provided, and description only says 'Send an email' without disclosing behavioral traits such as blocking behavior, rate limits, success/failure responses, or authentication requirements.

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?

Extremely concise at one sentence, but slightly under-specified for a tool with 5 parameters and no output schema. Structure is minimal but acceptable.

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?

Without output schema or behavioral hints, the description is incomplete for a tool with 5 parameters and 4 required fields. No return value information or error handling context.

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 baseline is 3. The description adds no additional meaning beyond the schema; it does not explain formats, restrictions, or the purpose of optional parameters.

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?

Description clearly states the verb 'Send' and resource 'email' but does not differentiate from sibling tools like spix_email_reply, which also sends email.

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 on when to use this tool versus alternatives (e.g., spix_email_reply, spix_sms_send), nor any prerequisites or limitations.

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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