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

Annotations already declare read-only, idempotent, open-world, and non-destructive behavior. The description adds important behavior beyond annotations: it is a pointer tool, does not consume quota, directs the caller to the tool that does the work, presents information only, and returns one or two lines per item for scanning.

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 contains useful constraints, but the opening disclaimers are repetitive and push the actual purpose behind them. The content is reasonably organized after that, yet it could be tighter and more front-loaded around what the tool returns.

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 simple read-only pointer tool with one optional parameter and no output schema, the description explains the content categories, scan-friendly output format, quota behavior, and policy-boundary exclusion. An agent has enough context to call it correctly.

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 has 100% description coverage for the single optional date parameter, including YYYY-MM-DD format and defaulting to today. The description adds no additional parameter guidance, so the schema already carries the parameter semantics.

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 says this returns the GovInbox daily brief and lists its contents: new opportunities, expiring notices, awards, grants, and regulatory changes. It does not explicitly distinguish this from siblings such as show_govinbox or the search_* tools, except for the policy-boundary exclusion, so it is clear but not fully differentiated.

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?

It gives a strong explicit when-not rule for bid/no-bid, eligibility, qualification, certification, and related questions, and routes those to explain_policy_boundary. It also signals the daily-scan use case, but does not explicitly compare this tool with other daily overview or inbox-related siblings.

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