email

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

With no annotations provided, the description carries the full burden of behavioral disclosure. While it mentions three categories of operations, it doesn't disclose important behavioral traits: whether operations are read-only or mutative, what permissions are required, rate limits, whether email sending is immediate or queued, or what happens on failure. For a tool with 15 parameters and no annotations, this represents a significant gap in behavioral transparency.

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?

The description is extremely concise - a single phrase with three bullet-like components. It's front-loaded and wastes no words. However, given the complexity of the tool (15 parameters, 9 distinct operations), this level of conciseness may be too sparse. Every word earns its place, but more information might be warranted for such a multifaceted tool.

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?

For a complex tool with 15 parameters, 9 distinct operations, no annotations, and no output schema, the description is inadequate. It doesn't explain the relationship between operations and parameters, doesn't provide examples, doesn't mention error conditions or response formats, and doesn't differentiate from sibling tools. The description fails to provide the contextual information needed to effectively use this multifaceted tool.

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?

The schema description coverage is 100%, meaning all parameters are documented in the schema itself. The description adds no parameter-specific information beyond what's already in the schema. It doesn't explain how parameters relate to different operations, which parameters are required for which operations, or provide usage examples. With complete schema coverage, the baseline of 3 is appropriate.

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 states 'Transactional email operations - send emails, manage templates, track events' which provides a general purpose but lacks specificity. It mentions three broad categories of operations but doesn't distinguish this tool from sibling tools like 'email_with_tracking' or 'campaigns' which may have overlapping functionality. The purpose is clear at a high level but not specific enough for precise tool selection.

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?

The description provides no guidance on when to use this tool versus alternatives. With multiple sibling tools that likely handle email-related operations (email_with_tracking, campaigns, conversations), there's no indication of what makes this tool distinct or when it should be preferred over those alternatives. The description offers only a functional summary without contextual usage information.

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