estimates_email

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

No annotations are provided, so the description must fully disclose behavior. It only says 'email an estimate' without explaining side effects (e.g., marks estimate as sent, logs email, triggers notifications) or idempotency. The agent lacks insight into what happens when the tool is invoked.

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 (six words) and front-loads the core action. However, it may be too terse, omitting important context that could justify a slightly longer description. Every word earns its place, but the brevity sacrifices completeness.

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?

Given the tool is a mutation (sends an email) with no output schema and no annotations, the description is insufficient. It does not mention prerequisites, expected behavior, error conditions, or post-conditions. The agent lacks enough context to use the tool correctly or handle failures.

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 input schema covers the single parameter 'id' with a description ('Estimate ID'), achieving 100% schema coverage. The description does not add any additional information about the parameter beyond what is already in the schema, resulting in no extra value.

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 clearly states the action ('email') and the resource ('estimate to the customer'). It distinguishes from siblings like 'estimates_print' (print) and 'estimates_convert_to_invoice' (convert). However, it could be more specific about what 'email' entails (e.g., sending via default template to the customer's 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?

No guidance is provided on when to use this tool versus alternatives like 'estimates_print' or 'invoices_email'. There is no mention of prerequisites (e.g., estimate must exist, customer must have email) or conditions (e.g., estimate must be in a certain status).

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