Okular: open documents and pages

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

The readOnlyHint annotation already establishes a safe read operation, and the description is consistent with that. It adds a short summary of what is returned (document path, 1-based current page, page count) and notes open Okular windows, but does not disclose broader behavioral traits such as permissions or limitations.

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 short, front-loaded sentences with no filler. It states the core purpose first and then summarizes the returned fields, which is appropriately sized for a simple read-only state query.

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 an output schema and readOnlyHint annotation, the description is nearly complete for correct invocation: it identifies the resource and summarizes the payload. It lacks sibling routing or usage guidance, but that is not required for a zero-parameter read operation.

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?

The tool has zero input parameters, so there are no parameter semantics for the description to add. The empty schema is self-explanatory, and the description appropriately focuses on the state being queried.

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 resource—Okular's current PDF/page state—and enumerates the returned fields (document path, current page, page count). It is clear enough to distinguish this from generic state getters, though it does not explicitly contrast with siblings like page_text or goto.

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 guidance or mention of alternatives. The description implies querying the current viewer state, but does not say when to choose this over goto, page_text, or other sibling tools.

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