send_campaign

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

Despite no annotations, the description covers authentication, rate limits, irreversibility, and mode respect (read-only/dry-run). It could explicitly state that the operation is not idempotent, but it's clear from context.

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

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

Well-structured with sections (purpose, guidelines, behavioral, args, returns, example). Slightly verbose but every sentence adds value.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Covers prerequisites, failure conditions, return format, and edge cases (already sent, scheduled). Complements the input schema and output schema fully.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Input schema has 0% coverage, but the description adds rich semantics: required status ('save'), prerequisite content, and how to obtain the ID from create_campaign or list_campaigns.

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

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

The description explicitly states the action: 'Send a campaign immediately to all targeted recipients.' It clearly distinguishes from sibling tools like schedule_campaign and send_test_email.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

Provides explicit conditions: 'Use for immediate delivery. The campaign must have content set via set_campaign_content and be in save (draft) status. Use schedule_campaign instead to send at a future time. Use send_test_email first to preview.' It also notes irreversibility.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.