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

With no annotations, the description carries the full burden. It usefully discloses an OCR page cap (up to 100 pages), pricing parity with ocr_pdf, and Russian/English language support, which are real behavioral traits beyond the schema. It says nothing about authentication, the non-OCR conversion path, or failure behavior, so the disclosure is only partial.

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 tight lines: purpose first, then each parameter annotated inline with zero filler. Every sentence earns its place and the most important 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 low-complexity two-parameter conversion tool with an output schema (so return values need not be described), the definition covers purpose, both parameters, and key operational limits. The main gap is the absence of any when-to-use-versus-alternatives guidance among the crowded sibling set.

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 0%, so the description must compensate, and it does: file_url is defined as a public URL of the PDF and ocr is explained as the scanned-document text-recognition switch with language and page-limit context. Both parameters get meaning the bare schema lacks.

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?

States a specific verb and resource ('Конвертирует PDF в редактируемый Word-документ (.docx)'), and the explicit .docx output implicitly separates it from siblings like pdf_to_txt, pdf_to_markdown and pdf_to_pptx. It does not, however, name or route away from any sibling explicitly.

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?

There is no guidance on when to choose this tool over the many competing conversion siblings (pdf_to_txt, pdf_to_markdown, ocr_pdf, etc.). The only conditional statement ('скан без текста') describes when to set the ocr flag, not when to use the tool itself.

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