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

No annotations are provided, so the description carries the full burden. It does disclose the return payload (size, type, format, status, expiration, tags, download URLs), which signals a read-only metadata lookup, but it says nothing about permissions/auth, rate limits, or behavior on an invalid or expired file ID.

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 tight sentences with no filler: the action is front-loaded and the return contents follow. Nothing is repeated needlessly.

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?

With no output schema and no annotations, the description usefully enumerates the metadata fields returned, which is the main gap it needed to close for a single-parameter read tool. Missing only error/not-found behavior and how download URLs expire.

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% — the fileId pattern and 24-character hexadecimal constraint are fully documented in the schema. The description only restates 'by ID', adding no meaning beyond the schema, so the baseline 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?

States a specific verb+resource pair: 'Get detailed information about a specific uploaded WhatsApp file by ID.' The word 'uploaded' implicitly separates it from get_whatsapp_chat_file_details and download_whatsapp_file, but no sibling is named 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?

Usage is only implied by 'by ID' — an agent can infer it needs a known file ID and wants metadata. There is no explicit when-to-use / when-not-to-use guidance and no mention of alternatives such as search_whatsapp_outbound_files for discovering an ID first.

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