render_report

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

With no annotations provided, the description carries the full burden. It discloses the tool writes a local file, is deterministic, uses a specific path pattern, and requires user confirmation. This is transparent about side effects and safety.

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?

Three concise sentences: purpose with output path, parameter explanation, and safety warning. Every sentence adds value, and key information is front-loaded.

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 file-generation tool with no output schema and no annotations, the description covers the action, output contents, file location, parameters, and confirmation requirement. It is sufficiently complete for an agent to select and invoke 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 no descriptions for 'period' or 'narrative', and the description compensates by explaining period format (YYYY-MM) and narrative placement (short plain-text paragraph under the headline). This adds essential meaning beyond the raw schema.

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 uses the specific verb 'Render' and identifies the resource as a visual report PDF with components (stat row, spend-vs-budget chart, trend, flags), distinguishing it from sibling data-analysis tools. It also specifies the output path pattern.

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 clearly states when to call (to render the monthly report) and includes a mandatory prerequisite: confirm with the user before calling. It does not explicitly exclude alternatives, but no sibling tool performs report rendering, so context is clear.

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