Render a document

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

No annotations are provided, so the description carries full burden. It reveals the output format (base64) and that it creates files, but lacks details on side effects, authentication needs, rate limits, or any destructive behavior. For a write operation, this is insufficient.

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 two sentences with no redundant words. It front-loads the core purpose and immediately follows with output and usage context. Every sentence earns its place.

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 the tool's complexity (2 simple params, no output schema, sibling tools exist), the description is minimally adequate. It covers purpose, output format, and usage context, but lacks details on error handling, return value structure (beyond base64), or prerequisites.

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 description coverage is 100%, so the baseline is 3. The description does not add significant meaning beyond the schema: it mentions 'structured spec' and 'Office bytes' but does not elaborate on the spec object structure or format details.

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 verb 'Render' and the resource 'structured spec into real Office bytes', and explicitly adds scope ('xlsx/pptx/docx') and output format ('base64'). It also distinguishes itself as the 'primary authoring path' among siblings.

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 clear context for when to use the tool ('after an agent writes a spec') and positions it as the primary authoring path, but does not explicitly state when not to use it or compare it to alternatives like apply_edits or convert_document.

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