read_pages

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

There are no annotations, so the description carries the full burden. It discloses the core behavior (reads text) and implies a non-mutating operation through the word 'Read', but it does not mention return format, error handling, or page-boundary behavior. It is adequate but not rich.

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?

Two sentences with zero waste. The first sentence states the purpose clearly, and the second provides usage guidance. The content is front-loaded and every word contributes value.

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 simple read tool with three fully documented parameters and no output schema, the description plus schema supplies the essential information: what the tool does, when to use it, and the page-range arguments. The lack of return-format details and edge-case behavior is a minor gap, not a serious omission.

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%, with all three parameters (file_path, start_page, end_page) already described in the schema. The description only mentions 'page range' and adds no extra meaning beyond what the schema provides, so the baseline of 3 applies.

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 states a specific verb ('Read'), a clear resource ('text content from a specific page range'), and scope. The phrase 'when chapters are too large' implicitly differentiates this from sibling chapter-level tools like read_chapter, making it easy for an agent to distinguish the operation.

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 gives explicit when-to-use guidance: 'Use this for fine-grained control or when chapters are too large.' It clearly implies an alternative (chapter-based reading) and provides context for selecting this tool, though it doesn't explicitly name the sibling or state when not to use it.

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