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

With no annotations, the description must carry the behavioral burden; it discloses the team-owner restriction and that the data mirrors the Friday email, which implies a read-only preview. However, it never states that no email is actually sent, nor whether the preview is cached or live, leaving the side-effect profile implicit.

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 front-loaded sentence with no filler; the audience restriction comes first and the clarifying analogy to the Friday email earns its place.

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, no-output-schema tool, the definition covers who can call it and what it represents. The only gap is that it doesn't hint at what fields appear in the digest, which matters somewhat given there is no output schema.

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 tool takes zero parameters, which is the baseline-4 case; the description correctly implies no input is required beyond team-owner identity.

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?

Uses a specific verb ('previews') and resource ('weekly team stats digest') and adds an anchor ('same data as the Friday email') that makes the output concrete. It does not explicitly differentiate itself from sibling get_team_metrics, but an agent can tell what this tool returns.

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 'Team owner:' prefix signals an audience/permission prerequisite, which is useful when-to-use context, but there is no explicit condition or named alternative (e.g., get_team_metrics or get_public_stats) telling the agent when to pick this versus a live metrics tool.

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