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

With readOnly/idempotent annotations already covering the safety profile, the description adds real behavior: publication is re-checked on every read, private or withdrawn bases return 404, and no cached files are served post-withdrawal. These disclosures go beyond what annotations provide. It does not, however, describe the returned payload.

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 opening sentence is well front-loaded, but the middle content about base.embed_url iframes, search character limits (3–160), and 20-results-per-page pertains to embedding/search, not downloading an original file. This off-purpose boilerplate dilutes an otherwise short definition.

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 zero-annotation-burden, two-required-param download tool with no output schema, the description covers access rules well but never states what the call returns (file bytes, content type, redirect). The core retrieval contract is left implicit.

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%, with both base_id and document_id fully documented (64-character IDs). The description adds no format or usage detail beyond the schema, so the baseline 3 is appropriate.

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?

"Download the original file" gives a specific verb and resource, and "original" implicitly contrasts with the derived-format siblings (pdf_source, docx_source, markdown, image). However, it never names which sibling to prefer for converted formats, so the differentiation is implied rather than stated.

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?

"Published bases only" and "No account required" establish use conditions, and the 404-on-withdrawal rule clarifies boundaries. But there is no explicit routing to alternatives (e.g., when to use the derived-format readers instead), so guidance is implied rather than directive.

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