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

With no annotations, the description carries the burden. It discloses the authentication requirement and the inclusion of navigation links, which is useful. However, it does not describe side effects (e.g., email delivery failures, rate limits), permission needs, or whether the OTP is consumed. The behavioral disclosure is average, not extensive.

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 two sentences, each earning its place: the first states the action and object, the second states the authentication requirement. No redundant or filler content.

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?

The description is concise yet sufficient for a straightforward email-sending tool with a well-documented schema. It includes purpose and auth, while the schema covers parameters. It could briefly mention that the optimization must be completed first, but the jobToken description already implies that. Overall, it provides enough context for tool selection and invocation.

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 covers 100% of parameters with descriptions, so the baseline is 3. The description does not add any parameter-level meaning beyond what the schema already provides; it merely restates the authentication options that are already documented in the properties.

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'), the resource ('optimized route results with navigation links'), and the recipient ('specified email address'). It distinctly separates this tool from its siblings (checkOptimization, getOneTimeCode, startOptimization) by identifying the email-sending step.

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 implies usage after optimization by referencing 'optimized route results' and requires a 'jobToken from completed optimization' in the schema. It also provides explicit authentication options (otpCode+otpEmail or mroApiKey). However, it does not explicitly state 'use after checkOptimization confirms completion' or exclude alternative flows.

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