read_document

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

With no annotations, the description takes on the disclosure burden. It usefully discloses that the tool returns text/image and that the caller must perform summarization. However, it does not mention truncation behavior related to max_chars/max_pages, error handling, or how images are represented in the return value.

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 compact sentences with no filler. The primary purpose is front-loaded, and the second sentence adds a meaningful caveat about caller responsibility. Every sentence earns its place.

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 core read-and-return semantics and supported formats are covered, and the 'caller must summarize' note is helpful. However, with no annotations, no output schema, and undocumented max_chars/max_pages, an agent still lacks guidance on partial reads, truncation, or complete return-value structure.

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 input schema has 0% description coverage, so the description must compensate. It only implies that 'path' points to a supported document file; max_chars and max_pages are not explained at all, leaving the agent to guess their semantics beyond names and defaults.

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 uses a specific verb ('reads') and clearly identifies the resource: document files (PDF, PPTX, DOCX, SVG, images). It also states the output type (text/image), and the sibling tool list_folder_structure is clearly different, so an agent can distinguish them.

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 implies it is for retrieving document content rather than summarizing, and the sibling is for listing folder structureikuha. However, it never explicitly states when to use this tool vs. list_folder_structure, nor does it mention exclusions or alternatives.

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