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

No annotations are provided, so the description carries the full behavioral burden, and it is silent on key mutation traits: whether the original file is overwritten or a new PDF is returned, and whether the operation is non-destructive. It discloses only the basic action.

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 short lines, front-loaded with the action followed by the two parameter notes. Nothing is padded and each line adds information.

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?

The output schema covers return values and both params are described, but for an un-annotated file-mutating tool the definition omits whether the source is modified in place or a new file is produced, leaving a meaningful gap for correct invocation.

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?

With 0% schema description coverage the description must compensate, and it does define both parameters: file_url as a public PDF URL and new_order as a 1-based ordering with a concrete example ([3,1,2]). It stops short of stating whether new_order must be a full permutation of all pages or may omit/duplicate pages.

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 ('Переупорядочивает страницы PDF' / reorders PDF pages), which is enough to distinguish it from delete_pages, extract_pages, and rotate_pdf by the operation performed. It is clear but never explicitly contrasts itself with those 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?

There is no when-to-use, when-not-to-use, or alternative guidance at all. The description only states what the tool does, leaving an agent to infer that reordering is the intended selection versus, say, merging or splitting.

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