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 usefully discloses the shape of the response (sender info, chat context, media details, download URLs) and implicitly that this is a read-only lookup, but says nothing about permission requirements, behavior when the ID is invalid or the file is deleted, or rate limits.

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 short sentences, front-loaded with the purpose and followed by the return contents. Nothing is wasted, though it is too brief to cover routing or failure behavior.

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 two-parameter read lookup with no output schema, the description adequately covers what is returned, which the agent would otherwise not know. The missing piece is sibling disambiguation and error behavior, which keeps it short of a 5.

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 coverage is 100% and both parameters are fully documented, including the 24-character hex format for each, so the schema does the heavy lifting. The description only adds the idea of lookup 'by ID', which is already obvious from the parameter names — baseline 3.

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 ('Get detailed information about a specific received file from a WhatsApp chat by ID') and narrows scope with 'received'. However, it never distinguishes itself from the near-identical sibling get_whatsapp_file_details, leaving the agent to guess which one applies to chat-scoped files.

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 or when-not-to-use guidance, and no routing to alternatives. With siblings like get_whatsapp_file_details, download_whatsapp_chat_file, and search_whatsapp_chat_files in the same namespace, the absence of any disambiguation is a real selection hazard.

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