send_scheduling_email

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

The description explicitly states it 'opens' the client rather than sending, which is a useful behavioral trait. However, with no annotations, it doesn't disclose whether sending requires user confirmation, what happens if no mail client is configured, or any security/side-effect considerations beyond opening a program.

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?

A single sentence, front-loaded with the action ('Opens the default mail client'), no filler, and every word contributes meaningful information. It is appropriately sized for the tool's simplicity.

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 zero-parameter tool with no output schema, the description is mostly complete: it states the action, the content, and the recipient. It loses a point because it doesn't mention the side effect beyond opening the client (e.g., whether this is a draft or automatically sent), and lacks any guidance on when to use it, but overall it's adequate.

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?

With zero parameters and an empty input schema, the description is the only source of parameter-related meaning. It explains that the email will be 'pre-populated with a scheduling request' and directed 'to contact Matt,' providing useful semantic context that the schema cannot.

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 uses a specific verb ('Opens') and resource ('default mail client pre-populated with a scheduling request'), clearly distinguishing it from sibling query tools like query_resume_history and get_company_deep_dive. It also names the intended recipient ('contact Matt'), making the purpose unmistakable.

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?

No guidance is provided on when to use this tool versus alternatives, and no exclusions or prerequisites are mentioned. The sibling tools are data-retrieval operations, but the description doesn't explicitly address selection criteria or context.

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