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

With no annotations provided, the description carries full responsibility for behavioral disclosure. It mentions output formats and being browser-based, but does not reveal what inputs are required, whether it launches a UI, how documents are delivered, or any side effects. This is a minimal one-line statement with no deeper transparency.

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, front-loaded sentence that states the tool's purpose and format in under 20 words. Every word earns its place, and there is no redundancy or filler.

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 zero parameters and no output schema, the description provides the core purpose and format, which is adequate for simple generation tools. However, it lacks information about the expected result (e.g., a downloadable file link, a rendered preview), which would help the agent know what to do next. The 'Browser-based tool' hint partially compensates but is not enough for full completeness.

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 has zero parameters, so the schema provides no meaningful information. The baseline for 0-param tools is 4, and the description does nothing to harm that. However, it also does not explicitly state that no parameters are needed, but this is not required since the schema already reflects it.

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 creates income/expenditure budget documents (収支予算書) for subsidy applications, specifying output formats (Excel/PDF). This specific resource and verb distinguish it from sibling financial tools like profit-loss or cash-flow-statement, which serve different purposes.

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. It does not mention scenarios, prerequisites, or exclusions. The only contextual clue is 'Browser-based tool,' which is insufficient for an agent deciding between this and other financial document generators.

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