get_stats

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

No annotations are present, so the description carries full responsibility for behavioral disclosure. It only states 'Get', implying a read operation but does not elaborate on idempotency, side effects, data freshness, or rate limits. This is insufficient for an agent to understand the tool's behavior.

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 a single sentence of 4 words, which is extremely concise. While it avoids verbosity, it lacks structure and front-loading of key information. It could be expanded slightly to include more context without becoming excessive.

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 has 3 parameters and no output schema, the description is too sparse. It does not mention the type of statistics returned (e.g., aggregate counts, deliverability metrics) or how the tool relates to sibling stats tools. This gap hinders an agent's ability to understand the tool's full capabilities.

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 has 100% coverage with descriptions for all three parameters (start_date, end_date, aggregated_by). The description adds no extra meaning beyond what the schema already provides, so the baseline score 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 'Get SendGrid email statistics' clearly states the verb (Get) and resource (SendGrid email statistics), making the tool's purpose understandable. However, it does not differentiate from sibling tools like 'get_single_send_stats' or 'list_single_send_stats', which similarly retrieve statistics.

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, such as more specific stats tools. There are no hints about prerequisites, limitations, or appropriate contexts, leaving the agent without decision-making support.

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