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

Annotations already establish readOnlyHint=true and openWorldHint=false, so the description only needs to add operational behavior. It does: returns a one-time download link or local file path, requires the report feature, and notes the render is cached and free. These details go beyond the annotations without contradicting them.

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 front-loaded and logically organized, but it contains redundancy: the opening sentence already lists the full/audit_full/audit_issues variants and the third sentence restates the same mapping. The trailing parenthetical '(free — cached render)' also feels appended. It is reasonably sized but could be tightened.

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 that an output schema exists and annotations cover the safety profile, the description covers the remaining operational essentials: output delivery, local-mode behavior, feature gating, and cost/caching. Nothing critical for calling the tool correctly appears to be missing.

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?

Schema coverage is 100%, so the baseline is 3. The description largely restates what the input schema already says about project_id and kind, and adds little new meaning for period or sections. It does not compensate with additional parameter-level insight beyond the 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 names the specific action ('Produce') and resource ('branded PDF report'), and enumerates the exact report variants: full, audit_full, and audit_issues. This makes it immediately distinguishable from sibling generation tools like generate_schema and generate_content_brief. The purpose is explicit and concrete.

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 gives clear usage context by mapping the three kind values to concrete report types and stating the prerequisite that the report feature must be enabled on the account. It does not explicitly contrast with sibling tools or provide when-not-to-use conditions, but the context is strong enough for an agent to select this tool appropriately.

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