Send File By Url

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

There are no annotations, so the description carries the burden. It does disclose a meaningful non-obvious behavior: the file is sent directly from the public link without being downloaded to this machine. But it omits other behavioral context such as failure modes, URL accessibility requirements, return value, or side effects beyond the obvious send.

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?

A single, front-loaded sentence that immediately communicates the core action and the key behavioral nuance. There is no filler, repetition, or unnecessary detail.

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 annotations and no output schema, the description still leaves the agent guessing about return values, error handling, whether the URL must be publicly reachable from the server, and how chat_id/file_name/caption are used. It is adequate for recognizing the tool, but not for predicting the full behavior of a call.

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 0%, and the description only clarifies url_file by calling it a public link. It does not explain chat_id, file_name, or caption, nor their relationships. With 4 parameters and no schema-level descriptions, the definition should compensate much more than it does.

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 clear action ('sends a file') and the specific delivery mechanism ('by public link'). It also adds a distinguishing behavioral detail ('without downloading it to this machine') that separates it from the sibling send_file, which might copy the file locally before sending.

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 when to use the tool: when the file is available via a public URL and should not be downloaded to the host machine. However, it never explicitly names an alternative or states when not to use it, so the agent must infer the routing from the phrasing and sibling list.

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