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

Annotations already declare read-only and idempotent behavior, which the description does not contradict. The description adds details about the output content (deadline, cost, etc.) but does not provide additional behavioral context such as side effects, rate limits, or error handling. Thus it meets the baseline for annotation coverage.

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, well-structured sentence that lists all key aspects in a concise manner without any fluff or redundancy. It is easy to parse and understand.

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 tool with one parameter and no output schema, the description is highly complete. It specifies exactly what information will be returned (deadline, cost, penalty, etc.), making its purpose and output expectations clear without needing additional details.

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 provides full coverage for the only parameter (obligation_id) with a clear example. The description does not add any extra meaning to the parameter beyond what the schema already states, so the score is at the baseline.

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 tool explains a single obligation and lists the specific details provided (what it is, why it exists, deadline, cost, penalty, remediation steps, government source). This distinguishes it from sibling tools that target different resources.

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 clearly implies the tool is for explaining an obligation, but it does not explicitly mention when to use it over alternative tools like 'explain_books_check' or mention exclusions. While the name and context make the usage clear, explicit alternative guidance would strengthen it.

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